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**1. The problem statement, all variables and given/known data**

Derive an equation relating the angle of incidence and the angle of refraction as light travels from air to glass. Do it in the form of Θ2/Θ1 = expression

**2. Relevant equations**

I think the equation to use here is Snell's law. Right?

n1sinΘ1 = n2sinΘ2

n1 = nair = 1.0003 approximately 1

n2 = nglass

Θ1 = angle of incidence

Θ2 = angle of refraction

**3. The attempt at a solution**

n1sinΘ1 = n2sinΘ2

n1/n2 = (sinΘ2)/(sinΘ1)

1/n2 = (sinΘ2)/(sinΘ1)

However, I'm having problems on how to remove the sin on the right side of my equation. I know I can't just apply arcsin to both sides since that wouldn't remove the sin in both the numerator and the denominator of my fraction. Please help!