All Questions
16
questions
0
votes
2
answers
123
views
Diffraction when the wavefront is not parallel to the plane
I am studying Feynman's chapter on the origin of the index of the refractive index (see this link).
If I am not mistaken, what he does is to prove that when a wave enters a medium (modelled as a ...
- 507
1
vote
0
answers
65
views
What are the physics behinde reflection and refraction of electromagnetic wave at a dialectric surface?
I have understood the most of the equations that lead to the Fresnel-Equations from electromagnetic waves and Maxwell equations. But not enough to understand what is happening. So I don't ask for an ...
- 11
0
votes
1
answer
50
views
What does the wave created during refraction look like?
People always describe refraction as light stimulating the electrons in the glass, which create their own light, which interferes with the original wave. They always say “the math is too complex, but ...
- 103
0
votes
1
answer
170
views
What does the wave look like during refraction?
For example, in this image,
It shows the wave contract and shorten the wavelength. Is this actually what light looks like in a denser medium or is it more like the wave is phase shifted back ...
- 103
0
votes
0
answers
105
views
Why is the refractive index $n$ linked to the wavevector $\hat{n}$?
Preamble: I'm studying light-light scattering in Effective QED but I notice that I don't remember a single thing from my EM/Optics courses so I decided to review some things.
Question: why is the ...
- 5,931
1
vote
1
answer
139
views
Why Analytic in the upper hald plane required for Kramers-Kronig relations?
I've been reviewing the contents after quite a while. Now, when I'm reading Kramers-Kronig relations, I see that everywhere it is stated that the complex function have to be analytic in the upper half ...
- 141
1
vote
3
answers
2k
views
Are the amplitudes of the electric field and the magnetic field of an electromagnetic wave equal?
In an electromagnetic wave, is the maximum amplitude of the electric field the same as that of the magnetic field? I ask this question which may seem silly because on all the diagrams representing an ...
2
votes
4
answers
453
views
How we can explain bending of electromagnetic waves in a different optical media?
How can we explain the bending of light when it moves through different optical media by Maxwell's equations treating light as an electromagnetic wave?
5
votes
1
answer
241
views
EM wavelength in different medium
Considering a light wave traveling from the vacuum to air, I am trying to find what will happen to its wavelength.
At first, using optics, we know that:
$$n=\frac{c}{v}$$
where $n$ represents the ...
- 121
0
votes
1
answer
160
views
Reflection and transmission of EM waves
I'm reading "Introduction to Electrodynamics" by David J. Girffiths and the following assumption is confusing me:
We have an EM wave inciding on a surface,
Then, when applying the boundary ...
- 115
-1
votes
1
answer
96
views
How I can prove refractive index in an environment is this? [closed]
in "Applied Quantum Mechanics" by A.F.J. Levi, is a problem that I couldn't solve it can any solve it:
if electrical filed is:
$$
\mathbf{E}\left(\mathbf{r}, \omega \right) =\mathbf{E}_{0}\left(\...
- 189
0
votes
0
answers
93
views
Index of refraction for travelling EM wave problem
Let $n_1$ be the index of refraction of the first medium and $n_2$ be the index of the second medium.
When $n_2>n_1$, then for an incident angle of $90^{\circ}$ we get a refracted light at a ...
- 7,720
3
votes
1
answer
3k
views
How to interpret the complex index of refraction?
The index of refraction which represents how much light gets refracted when entering a medium is defined as
$$n = \frac{c}{v}$$
I have seen it stated in several places, such as here, that we can ...
- 217
0
votes
0
answers
2k
views
Refractive index and electric susceptibility
Suppose we have a complex refractive index $n_{ref}=n+ik$ whose value is given at a precise frequency $\omega_l$ from experimental data. We know that the imaginary part is responsible for the loss/...
0
votes
1
answer
2k
views
What does non magnetic and nonconducting mean in reflection and transmission of waves?
So, we were ask to consider the Fresnel Equations for parallel and perpendicular waves (with index of refractions).
Then, we are ask to prove some equations in which "... for nonmagnetic non-...
