- #1

timetraveller123

- 621

- 45

but many sites just state n = ## \frac{\lambda_o}{\lambda}## but that just seems to be double reasoning so i googled more and found out something about electrons vibration and transimission of light energy

so this is my understanding thus far

in vacuum speed of light is just ## \frac{1}{\sqrt{\mu_o \varepsilon_o}}##

so in any other medium the permittivity and permeability would have have to be replaced accordingly

why would those constants be affected by frequencies?

another reasoning was to think of light as constantly exciting electrons

every electron in the medium has its own resonance frequency

and the light that comes along has its own frequency

so essentially this is just a driven harmonic oscillator (was truly amazed there )

it is also my understanding that the delay in absorption and emission of the light is what is "slowing down the light"

so now my question is

- when the light is not of resonant frequency what exactly happens to the light i know it gets absorbed and emitted but what exactly is happening in the middle and what happens as the frequency changes

- when the light is of resonant frequency then what happens

any conceptual understanding will be useful and math would also be appreciated