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2 cards from this section. Quick, good the night before a test.
What is the refractive index of a medium if light travels at 2 × 10^8 m/s in it?
Use the formula n = c/v.
What happens to light when it travels from a less dense to a denser medium?
Think about how the speed of light changes.
What does a refractive index greater than 1 indicate?
Think about how light behaves in different media.
Snell's Law relates which variables?
Recall the law that includes both angles.
A ray of light strikes the interface between air (n=1) and diamond (n=2.42) at an angle of incidence of 60°. Calculate the angle of refraction.
Rearranging Snell's Law will help you find the needed angle.
If a fiber optic has a core with n=1.5 and cladding with n=1.45, determine if total internal reflection will occur when light travels from the core to the cladding at the critical angle.
Use the formula for critical angle based on refractive index.
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