When a beam of light passes at an oblique angle into a material of lower optical density, the angle of
incidence is
a. less than the angle of reflection.
b. greater than the angle of refraction.
c. greater than the angle of reflection.
d. less than the angle of refraction

The place you get your hair cut has two nearly parallel mirrors 6.00 m apart. as you sit in the chair, your head is 2.00 m from the nearer mirror. looking toward this mirror, you first see your face and then, farther away, the back of your head. (the mirrors need to be slightly nonparallel for you to be able to see the back of your head, but you can treat them as parallel in this problem.) how far away does the back of your head appear to be?

Critical mass is the of material required to produce a chain reaction. a.) minimum amount b.) atomic mass c.) precise amount d.) maximum amount

Which of the following are appropriate acceleration units?