# Physics

posted by
**Nathaniel** on
.

A ray of light of frequency 5.09 x 10^14 Hz passes from air into flint glass (n=1.6).

a.) If the ray enters the flint glass at an angle of 30*, what is the angle of refraction?

b.) What is the critical angle for a ray of light traveling from flint glass to air?

c.) What is the speed of light in flint glass?

d.) What is the wavelength of this light ray in air?

I suggest that you review Snell's Law for (a) and (b) and the definition of Index of Refraction for (c). For (d), use the equation (wavelength)*frequency) = (speed of light)

Frequency is a constant.