Why does the speed of light in glass change with increase in wavelength of light?

Answer 1

Due to change in medium it has reflective index different so it changes, when pass through glass, diamond or water

Answer 2

The refractive index of a medium is a measure for how much the speed of light is reduced inside the medium. For example, typical glass has a refractive index of 1.5, which means that light travels at 1 / 1.5 = 0.67 times the speed in air or vacuum.When a beam of light enters a medium from vacuum or another medium, it keeps the same frequency and changes its wavelength. This is because, (c=νλ where c is the velocity of light, ν is the frequency and λ is the wavelength) frequency remaining a constant, velocity decreases and something has to compromise for the change and that'll be wavelength.
Coming to your question, wavelength will decrease and not increase.

Answer 3

Yes, the refractive index in any medium other than a vacuum is greater for shorter wavelengths. To my knowledge, there is no widely accepted explanation for this, partly because you have to accept the existence of an ether before you can even imagine a cause for it. There are many ether theories, each with its own attempt to explain this phenomenon; experiments to prove the theories have thus far failed.

I'm glad you asked this question because I have my own ether theory, and I have not yet tested my theory to determine if it can explain this phenomenon.

Answer 4

The optical density of the medium determines the speed,not the wave length.
Is the wave length determined the speed, white light could not be transmitted though glass.

Answer 5

It's due fact that the polarization resonance of molecules in glass is in the ultraviolet. The index of refraction in glass, which slows the speed of light in it, is due to molecular polarization. As the frequency approaches resonance (gets bluer), the polarizability and, therefore, the index increase.

Answer 6

since the up and down motion of the wave always remains the same (the frequency) then as the wave slows down ,due to entering a more dense medium, the particles (photons) do the up and down motion (1 wave) in a shorter space. therefore you are wrong as the wavelength decreases as the wave enters a more dense medium. p.s. if you didn't understand take into consideration a ball that you bounce on the floor ; at the same time you give the ball a forward motion so it creates arcs, the less forward velocity you give it will create more bounces in the same space, the same when the forward motion of a wave is slowed down in a more dense medium, obviously the reverse happen from a more dense to a less dense.