Refraction of light and wavelength

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siobhanbree
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Light of wavelength 680 nm in air enters water making an angle of 40 degrees with the normal. Find the angle of refraction and the wavelength of light in water.

I found the angle of refraction, but I don't know how to calculate the wavelength with this information.
 

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welcome to pf!

hi siobhanbree! welcome to pf! :smile:

hint: does the frequency change? what is the relation between wavelength and frequency? :wink:
 

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