The Balmer series or Balmer lines in atomic physics, is the designation of one of a set of six different spectral emission lines of the hydrogen atom whose energy levels can calculated using an empirical equation discovered by Johann Balmer in 1885.

Later Neils Bohr sought to explain them by using the Rutherford model of the atom as a nucleus surrounded by electrons and the new ideas of quantum mechanics. Bohr assumed that electrons orbit the nucleus at certain discrete, or quantized, radii, each with an associated energy. He also assumed that when electrons "fall" from larger to smaller orbits, they release electromagnetic radiation obeying the PlanckEinstein relationship. Because the energies of the orbits are quantized, so are the wavelengths. Bohr’s model explains both the Balmer series and the Rydberg constant and ushered in a new era of understanding atoms through quantum mechanics.
However Bohr felt that that no explanation of why electrons orbited in discrete, or quantized radii was needed because using that theoretical model based on that assumption was able to make very accurate prediction of energies of Balmer series.
Einstein disagreed because he felt that "If a new theory (such as that associated with Bohr’s model of the hydrogen atom) was not based on a physical image simple enough for a child to understand, it was probably worthless."
In other words he felt that if Bohr’s explanation of the Balmer series was to have any value one should be able to form a physical image of how and why the spectral lines in the Balmer series have the energy they do.
The importance of explaining theoretical concept in physical terms was demonstrated by Einstein when addressing one of the more troubling aspect of Newton’s gravity theory.
Most, including Newton were troubled by the fact that that his gravitational theory meant " that inanimate brute matter should, without the mediation of something else which is not material, operate upon and affect other matter without mutual contact…That gravity should be innate, inherent, and essential to matter, so that one body may act upon another at a distance through a vacuum, without the mediation of anything else, by and through which their action and force may be conveyed from one to another, is to me so great an absurdity that I believe no man who has in philosophical matters a competent faculty of thinking can ever fall into it."
However Einstein realized that one can understand how gravity "may act upon another at a distance through a vacuum" by extrapolating the physical image of how objects move on a curve surface in a threedimensional environment to a curved four dimensional spacetime manifold. This allowed him to conceptually understand gravity in terms of a physical image based on our threedimension environment.
In other words the mathematics developed by Newton was only able to quantitatively predict gravitational forces while Einstein gave us the ability to conceptually understand how and why "one body may act upon another at a distance" by physically connecting it to the reality of what we can see and touch.
However up until now no one has been able to define a physical model clear enough to explain the quantum mechanical model Bohr hypnotized was responsible for the spectral emissions associated with the Balmer series in terms of a spacetime environment.
One reason for both Einstein’s and modern scientist’s inability to define one can be traced to the fact that they chose to define their energies in terms of four dimensional spacetime instead four *spatial* dimensions because most view reality in terms of the physicality of the spatial dimensions instead of a time or spacetime dimension.
This is true even though Einstein’s spacetime theories give us a detailed physical image how a curvature in a spacetime manifold can be responsible for gravity by extrapolating the image of an object moving on a curved two dimensional "surface" in a three dimensional environment to four dimensional spacetime. However this image only contains reference to the physicality of the spatial dimensions and not a time or spacetime dimension.
This suggests that one may be able to develop a physical image how and why the energy levels in a hydrogen atom are what they are by converting or transposing Einstein’s spacetime universe which defines energy in terms of geometry of spacetime to one that defines it in terms of the physicality of the spatial dimensions..
Einstein gave us the ability to do this when he used the constant velocity of light and the equation E=mc^2 to define the dynamic balance between mass and energy because that provided a method of converting the time displacement he associated with energy in a spacetime universe to one to a spatial one in a universe consisting of only four *spatial* dimensions. Additionally because the velocity of light is constant he also allows us to defined a one to one quantitative and qualitative correspondence between his spacetime universe and one made up of four *spatial* dimensions.
In other words by defining the geometric properties of a spacetime universe in terms of mass/energy and the constant velocity of light he provided a qualitative and quantitative means of redefining it in terms of the geometry of only four *spatial* dimensions.
This fact is the bases for assuming as was done in the article “Defining energy” Nov 27, 2007 that all forms of energy can be derived in terms of a spatial displacement in a "surface" of a threedimensional space manifold with respect to a fourth *spatial* dimension.
However if true one should be able to form a physical image of why the energy of each of the Blamer lines are what they are by extrapolating the physicality of the spatial dimensions to a fourth *spatial* dimension.
In other words one would should be able to define why the elections associated with the Principal Quantum number (n), the Angular Momentum "ℓ" (l) Magnetic (m) and Spin Quantum Number (+1/2 and 1/2) have the energy they do by extrapolating the laws of a classical environment to a fourth *spatial* dimension while at the same time excluding all other energies.
In the article "Why is energy/mass quantized?" Oct. 4, 2007 it was shown one can derive the quantum mechanical properties of energy/mass by extrapolating the laws governing resonance in a threedimensional environment to a matter wave moving on a "surface" of a threedimensional space manifold with respect to a fourth *spatial* dimension.
Briefly it showed the four conditions required for resonance to occur in a classical Newtonian environment, an object, or substance with a natural frequency, a forcing function at the same frequency as the natural frequency, the lack of a damping frequency and the ability for the substance to oscillate spatial would occur in one consisting of four spatial dimensions
The existence of four *spatial* dimensions would give the "surface" of a threedimensional space manifold (the substance) the ability to oscillate spatially with respect to it thereby fulfilling one of the requirements for resonance to occur.
These oscillations would be caused by an event such as the decay of a subatomic particle or the shifting of an electron in an atomic orbital. This would force the "surface" of a threedimensional space manifold with respect to a fourth *spatial* dimension to oscillate with the frequency associated with the energy of that event.
Therefore, these oscillations on a "surface" of threedimensional space, would meet the requirements mentioned above for the formation of a resonant system or "structure" in space.
Observations of a threedimensional environment show the energy associated with resonant system can only take on the incremental or discreet values associated with a fundamental or a harmonic of the fundamental frequency of its environment.
Similarly the energy associated with resonant systems in four *spatial* dimensions could only take on the incremental or discreet values associated a fundamental or a harmonic of the fundamental frequency of its environment.
These resonant systems in four *spatial* dimensions are responsible for the incremental or discreet energy associated with quantum mechanical systems.
However the fact that one can derive the quantum mechanical properties of energy/mass by extrapolating the resonant properties of a wave in threedimensional environment to a fourth *spatial* dimension means that one should as mentioned earlier be able to define why Principal Quantum number (n), the Angular Momentum "ℓ" (l) Magnetic (m) and Spin Quantum Number(+1/2 and 1/2) have the energy they do by extrapolating the laws of a classical environment to a fourth *spatial* dimension while at the same time excluding all other energies.
In threedimensional space the frequency or energy of a resonant system is defined by the vibrating medium and the boundaries of its environment.
For example the resonant energy of a standing wave generated when a violin string plucked is determined in part by the length and tension of its strings.
Similarly the energy of the resonant system the article "Why is energy/mass quantized?" associated with atom orbitals would be defined by the "length" or circumference of the threedimensional volume it is occupying and the "tension" on the space it is occupying.
Therefore the physicality of "n" or the principal quantum number would be defined by the fundamental vibrational energy of threedimensional space that article associated with the quantum mechanical properties of energy/mass.
The circumference of its orbital would correspond to length of the individual strings on a violin while the tension on its spatial components would be created by the electrical attraction of the positive charge of the proton.
Therefore the integer representing the first quantum number would correspond to the physical length associated with fundamental vibrational energy of threedimensional space which in terms is dependent on the tension created by the electrical attraction of the proton and electron.
However, classical mechanics tells us that each environment has a unique fundamental resonant frequency which is not shared by others.
The reason an electron does not fall into the nucleus is because as was shown in the article "Why is energy/mass quantized?" all energy is contained in four dimensional resonant systems. Therefore the fundamental frequency or wavelength of four dimensional space would define the minimum energy and therefore the physical size of the first quantum orbital.
This defines physicality of the environment associated with the first quantum number and why it is unique for each subdivision of electron orbitals. Additionally observations tell us that resonance can only occur in an environment that contains an integral or half multiples of the wavelength associated with its resonant frequency and that the energy content of its harmonics are always greater than those of its fundamental resonate energy.
This allows one to derive the physicality of the second "ℓ" or azimuth quantum number in terms of how many harmonics of the fundament frequency a given orbital can support.
In the case of a violin the number of harmonics a given string can support is in part determined by its length. As the length increase so does the number of harmonics because its greater length can support a wider verity of frequencies and wavelengths. However, as mentioned earlier each additional harmonic requires more energy than the one before it. Therefore there is a limit to the number of harmonics that a violin string can support which is determined in part by its length.
Similarly each quantum orbital can only support harmonics of their fundamental frequency that will "fit" with the circumference of the volume it occupies.
For example the first harmonic of the 1s orbital would have energy that would be greater than that of the first because as mentioned earlier the energy associated with a harmonic of a resonant system is always greater than that of its fundamental frequency. Therefore it would not "fit" into the volume of space enclosed by the 1s orbital because of its relatively high energy content. Therefore second quantum number of the first orbital will be is 0.
However it also defines why in terms of classical wave mechanics the number of suborbital associated with the second quantum number increases as one move outward from the nucleus because a larger number of harmonics will be able to "fit" with the circumference of the orbitals as they increase is size.
This also shows that the reason the orbitals are filled in the order 1s, 2s, 2p, 3s, 3p, 3d, 4s, 4p, 4d, 4f, 5s is because the energy of the 3d or second harmonic of the third orbital is higher in energy than the energy of the fundamental resonant frequency of the 4th orbital. In other words classical wave mechanics tells us the energy of the harmonics of the higher quantum orbitals may be less than that of the energy of the fundamental frequency of preceding one so their harmonics would "fit" into circumference of the lower orbitals
The third or Magnetic (m) quantum number physical defines how the energy associated with each harmonic in each quantum orbital is physically oriented with respect to axis of threedimensional space.
For example it tells us that the individual energies of 3 "p" orbitals are physically distributed along each of the three axis of threedimensional space.
The physicality of the fourth quantum or spin number has nothing to do with the resonant properties of space however as was shown in the article "Pauli’s Exclusion Principal: a classical interpretation" Feb. 15, 2012 one can derive its physicality by extrapolating the laws of a threedimensional environment to a fourth *spatial* dimension.
Briefly the article "Defining potential and kinetic energy?" Nov. 26, 2007 showed all forms of energy including the angular momentum of particles can be defined in terms of a displacement in a "surface* of threedimensional space manifold with respect to a fourth *spatial* dimension. In threedimensional space one can use the right hand rule to define the direction of the angular momentum of charged particles. Similarly the direction of that displacement with respect to a fourth *spatial* dimension can be understood in term of the right hand rule. In other words the angular momentum or energy of an electron with a positive spin would be directed "upward" with respect to a fourth *spatial* dimension while one with a negative spin would be associated with a "downwardly" directed one.
Using your righthand: Point your thumb in the direction of the conventional current 
Therefore one can define the physically of the fourth or spin quantum number in terms of the direction a "surface" of threedimensional space is displaced with respect to a fourth *spatial* dimension. For example if one defines energy of an electron with a spin of 1/2 in terms of a downward directed displacement one would define a +1/2 spin as an upwardly directed one.
The physical reason why only two electrons can occupy a quantum orbital and why they have slightly different energies can also be derived by extrapolating the laws of a classical threedimensional environment to a fourth *spatial* dimension.
There a two ways to fill a bucket. One is by pushing it down and allowing the water to flow over its edge or by using a cup to raise it to the level of the buckets rim.
Similarly there would be two ways fill an atomic orbital according to the concepts presented in the article "Defining potential and kinetic energy?". One would be by creating a downward displacement on the "surface" of a threedimensional space manifold with respect to a fourth *spatial* to the level associated with the electron in that orbital while the other would be raise it up to that energy level .
However the energy required by each method will not be identical for the same reason that it requires slightly less energy to fill a bucket of water by pushing it down below its surface than using a cup to fill it.
However it also explains why no two quantum particles can have the same quantum number because observations of water show that there is a direct relationship between the magnitudes of a displacement in its surface to the magnitude of the force resisting that displacement.
Similarly the magnitude of a displacement in a "surface" of a threedimensional space manifold with respect to a fourth *spatial* dimension caused by two quantum particles with similar quantum numbers would greater than that caused by a single one. Therefore, they will repel each other and seek the lower energy state associated with a different quantum number because the magnitude of the force resisting the displacement will be less for them if they had a different number.
This shows how one can explain why spectral emissions specifically those of the Balmer series have the energy they do and the four quantum numbers in terms of emergent property of four *spatial* dimensions or four dimensional spacetime by extrapolating the laws of a classical threedimensional environment to them.
It should be remember that Einstein’s genius allows us to choose whether to define the physicality of the atomic orbitals in either a spacetime environment or one consisting of four *spatial* dimension when he defined the geometry of spacetime in terms of the constant velocity of light.
Later Jeff
Copyright Jeffrey O’Callaghan 2015
How does science especially physics help us to understand what we cannot see, or touch.
There are some who believe the best way to advance it is to observe the environment and then extrapolate those observations to the unobservable.
Isaac Newton used this approach to derive the law of gravity by making the assumption that mass generates an attractive gravitational force on all objects based on physical observations he made on the earth. The universality of its existence is based on the fact that one can determine the motion of all objects in the universe by assuming this force was responsible for it.
However, we cannot "see" a gravitational force. How then can we be sure that it really exists?
The answer is we cannot. However one reason why most believe it does is based on the fact it allows us to predict and explain the motion of objects that we can see and those that we cannot.
For example the position of Neptune was mathematically predicted using Newton’s concept of gravity before it was directly observed.
However, Quantum mechanics takes the opposite approach and assumes one can understand the laws of nature only by observing the results experiments and not the environment that surrounds them.
For example it defines the position of a particle by in terms of a mathematical probability distribution but says nothing about how it got there.
This differs from the Newtonian method in that it defines the solution to where an object is in terms of how it got there whereas quantum mechanics as motioned earlier defines it only in terms of where it is.
Both of these methods are valid because they give scientists the ability to make accurate predictions of future events.
However physics as the name implies is the science that deals with physical properties of matter, energy, and the forces that guide their interactions and not with abstract mathematics. Therefore, physicists should look to their observable properties as the primary vehicle and then mathematics to guide them understanding of the environment.
Unfortunately many seem to have gotten lazy in their pursuit of reality. Instead of taking the time and effort to fully understand the physicality of an environment many scientists make a few observations and turn to mathematics not observations to interconnect them.
For example The Big Bang Theory of cosmic evolution postulates the universe had its beginnings in a hot infinitely dense expanding environment. Using this assumption scientists have been able to successfully explain and predict many of the observed properties of our universe including the relative abundance of the elements and the formation of galactic clusters.
However, they have had considerable difficulty explaining why different regions of the universe that have not been causally connected to each other have the same temperature and other physical properties. This should not be possible, given that the exchange of information (energy, or heat, etc.) can only take place at the speed of light. This inconsistency between theory and observations is what cosmologists call the Horizon Problem.
In 1980 Alan Guth, Andrei Linde, Paul Steinhardt, and Andy Albrecht proposed a solution by modifying the Big Bang theory to include a short 10 ^{− 32} second period of exponential expansion (dubbed "inflation") within the first minutes of the universe’s history.
However, as was mentioned in the article "The Horizon Problem" Apr. 15, 2011 there is absolutely no observational basis for defining what caused this rapid inflation to begin or end. Therefore, some say it is an "ADHOC" or contrived explanation of a flaw in original the Big Bang Theory.
Even so within a few years of its publication it became the general accepted explanation based almost exclusively on mathematical arguments that reportedly verified it.
However, its rapid acceptance to the exclusion of others meant many of the resources that could be used to make more detailed observations and possibly find a less "ADHOC" one or one that is based more on observations less on mathematics were unavailable to those who wished to look for them
Our criticism is not with the inflation model per say but with those who after making a few tentative calculations determined that it provides the only solution and then proceeded to bully all others to accept it or get "out of town" so to speak.
Newton’s gravitational theory took many years of observing the relationship of the tides to the position of the moon, how an object moved on earth and in space before it was formulated. Granted he may have "alleluia" moment when he was able to connect them but that was because he made the very time consuming effort to observe and understand their environment.
Yet unlike the inflationary model Newton’s ideas were not accepted by the scientific establishment for many decades after their publication even though they made extremely accurate perditions of future events which is in sharp contrast to the inflationary model which makes only vague general predictions.
However this meant that many keep looking for alternatives and developed the observational technologies to advance them. Even though none were found for almost 200 years those investigations were important to the advancement of science because divergent ideas promote divergent types of investigations which inherently leads to a better understanding of the environment.
For example, many of the advancements made in 17 and 18 centuries optics were a direct result of the need to make more accurate observations of the movement of planets to either verify or refute Newton’s laws.
Recently there have been several observations such as those associated with Dark Energy and Matter that are extremely difficult to integrate into the inflationary model and other currently accepted theories of our universe evolution.
However, as mentioned earlier the quick and almost universal acceptance by the scientific establishment of the inflationary model has and most probably will continue to inhibit the search for alternatives and the scientific advancement that would have inevitably occurred if other ideas had been considered.
Observing the environment takes considerable time and effort.
Newton publish his "Philosophiæ Naturalis Principia Mathematica" containing his gravitational theory many years after he had formulated it because we believe he want to make sure that it was observationally correct even though he knew the mathematics it contained were unquestionable.
The problem with physics is not so much related to the science but the rush to judgment which we believe is based on the desire of many to be the first to propose and get credit for a solution to the extent that they do not take the time and effort to verify that it agrees not only mathematically but also with the observational environment their ideas encompassed.
Later Jeff
Copyright Jeffrey O’Callaghan 2015
In "The crises of our time, it becomes increasingly clear,are
the necessary impetus for the revolution now under way.
And once we understand nature’s transformative powers,
we see that it is our powerful ally, not a
force to feared or subdued."
Thomas Kuhn