# SAT II Physics : Optics

## Example Questions

### Example Question #1 : Optics Light passes from a medium with some index of refraction at 25 degrees from perpendicular and exits into another medium with an index of refraction of 1.5 at an angle of 35 degrees. What is the value of ?      Explanation:

Snell's law states: If we substitute the values from the question we get: Next rearrange to isolate  ### Example Question #1 : Optics

Which of the following scenarios would result in the polarization of light?

Light is reflected off of a glass window

A light source travels at a high velocity

Light is absorbed by a black body

Light passes through a vacuum

Light pass between two mediums with the same index of refraction

Light is reflected off of a glass window

Explanation:

Light is polarized when it is all oscillating in the same direction. This effect occurs when light is reflected. Polarization can occur through refraction, however if light is passing between mediums with the same index of refraction, the light will not refract.

### Example Question #1 : Optics, Waves, And Quantum

Of the following, which type of waves has the longest wavelength?

Microwaves

Orange light

Gamma rays

Green light

X-rays 