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Old Feb 9th 2011, 08:37 PM   #1
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Wavelength in material

This question is a two part question and I have answered the first part, but for the sake of the getting help on the second part I'll put the first.

1. Light passes from material A, which has an index of refraction of 4/3, into material B, which has an index of refraction of 5/4. Find the ratio of the speed of light in material B to the speed of light in material A.

The speed of light in material A = 2.25E8 m/s and the speed of light in material B = 2.40E8 m/s

2. In exercise 1, what is the ratio of the light's wavelength in material B to that in material A?
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Old Feb 9th 2011, 08:41 PM   #2
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Originally Posted by Tesoro72 View Post
This question is a two part question and I have answered the first part, but for the sake of the getting help on the second part I'll put the first.

1. Light passes from material A, which has an index of refraction of 4/3, into material B, which has an index of refraction of 5/4. Find the ratio of the speed of light in material B to the speed of light in material A.

The speed of light in material A = 2.25E8 m/s and the speed of light in material B = 2.40E8 m/s

2. In exercise 1, what is the ratio of the light's wavelength in material B to that in material A?
Hint: c = (lambda)f. We know that f is the same for both media....

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Old Feb 9th 2011, 08:44 PM   #3
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I know that the frequency of light doesn't change through each medium, but I haven't learned lambda

nvm, I just had a brain fart lambda = λ

Last edited by Tesoro72; Feb 9th 2011 at 08:48 PM.
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