Monochromatic Light Frequency in Glass (5.20 x 10^2 nm, n=1.50)

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Monochromatic light with a wavelength of 5.20 x 10^2 nm enters glass with a refractive index of 1.50. To find the frequency of light in the glass, the relationship between wavelength, frequency, and refractive index must be understood. While the wavelength changes when light enters a medium, the frequency remains constant regardless of the medium. This means that the frequency of light outside the glass is the same as inside, and the confusion arises from the change in wavelength due to the refractive index. Understanding that frequency does not change is crucial for solving the problem correctly.
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Homework Statement



Monochromatic light of a wavelength of 5.20 x 10^2 nm enters glass (n=1.50). What is the frequency of light in the glass?

Homework Equations


I am thinking I am supposed to use the formula : wave length = d(sin ( ) )/n
and then v=Frequency(wave length)


The Attempt at a Solution


This is where i got lost...

I attempted to use the formulas but got really confused.
 
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Forget the formulas. What's the frequency outside of the glass? Can the frequency inside of the glass be different? Frequency counts the number of waves passing per second. If the number outside and inside are different, where are the extra waves going?? This may be more of an understanding question than a formula question.
 

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