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I know it has something to do with Snell's law, but I can't seem to get the necessary equations to predict what happens. My teacher hasn't explained it, nor does my book.

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- Thread starter Elbobo
- Start date

- #1

- 145

- 0

I know it has something to do with Snell's law, but I can't seem to get the necessary equations to predict what happens. My teacher hasn't explained it, nor does my book.

- #2

tiny-tim

Science Advisor

Homework Helper

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How do I know when the light bends upward or downward?

Light

How do I know qualitatively how much the red and violet lights disperse apart?

It depends on the speed of red and violet light …

cacluating those speeds is

- #3

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Oooh, ok I understand the answer to my first question now, thanks :)

On the 2nd part, I figured as much, but I'm not trying to calculate exact speeds. For example, if I were to compare the dispersion of colors in Air-Prism vs. Water-Prism, how do I determine if the colors expand or contract? That's where I tried to find a formula combining wavelength and index of refraction, only to get confused and wind up here. =/

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