Recent content by MrFrankie

Thank you for the explanation :-) I will work on the Maxwell equation.

Well I agree with you about the energy continuity equation, but I don't agree with other points: 1) You usually have heating of the material for the absorption of energy in roto-vibrational levels, true for infrared spectra, but in this case you are using light, so energies of few eV. Usually in...

Sorry, maybe I've not explained what the problem is. I'm talking of the superposition of the two reflected waves, both part of the first incident wave, both having the same (wt-kr), only different for the phase, due to the different optical path. The intensity is not function of the space of...

Please can you explain me better this part? If the rays have the same direction and same frequency, and there is destructive interference, that is a constant Pi phase, how can they have constructive interference? Besides, the wave given by the supeposition of two waves should still be a wave...

Well... I'm not sure. Reflection and transmission amplitude depends on the relative coefficients of the material. I think it's Stokes Relations. You have interference only on the reflected ray, as a modulation of amplitude variable with the thickness of the film and the direction of the ray. the...

Thank you for the answer, but I'm still not sure. The point is that the amount of light transmitted is due to the transmission or reflection coefficients, a factor on the amplitude on the wave. Still the phenomenon of interference is due to the phase of the coherent overlapping waves. If you...

I'll post here a question that I've posted in another thread. The topic is the same. If you have only unidirectional wave and monochromatic light, and parallel film surfaces, you should observe the same overlapping on the whole wavefront. Let's suppose that the interference is completely...

This is exactly what happens. Anti-reflective coating http://wapedia.mobi/en/File:Optical-coating-2.png

The phenomenon is the typical interaction on thin layers of oil on the water surface.

No, there is no absorption of energy in the material, the wave is completely reflected or transmitted, without anelastic interaction. Anyway the absorption is a local phenomena and cannot depend on the interaction of the wave after the reflection on the second surface.

Suppose to have a beam of light reflecting over two parallalel surfaces of a material, so that the reflectd rays overlap. There is interference and the square of the amplitude is: r^2 * Eo^2 * sin (2Pi n d / L) where r is the reflection coefficient Eo is the max energy of the field n is the...