4.3 Refraction and Lenses

1. Who is the author of the book Opticks ? (pg.110)

Refraction can cause you to: (pg.111)

When light rays enter a new medium at an angle, the change in (a)   causes the rays to bend. (pg. 111)

Review: A medium is the (a)   through which a wave travels. (pg. 136) glossary

Some mediums cause light to (a)   more than others. (pg. 112)

Light travels fastest in (a)   . (pg. 112)

(a)   causes light to bend more than either air or water does. (pg. 112)

The index of refraction of a medium is a (a)   of how much a light ray bends when it enters that medium. (pg. 112)

When white light from the sun shines through water droplets in the air, what could appear? (pg. 113)

(a)  

Light travels faster in _____ air. (pg. 114)