Which best explains why the pencil seems bent?

a. light travels slower in air than glass

b. light travels faster in air than in water.

c. light travels at the same speed in all matter

d. light travels at different speeds in water and in glass.

Aswimmer is determined to cross a river that flows due south with a strong current. initially, the swimmer is on the west bank desiring to reach a camp directly across the river on the opposite bank. in which direction shoud the swimmer head? a. the swimmer should swim southeast. b. the swimmer should swim south. c. the swimmer shuold swim northeast. d. the swimmer should swim due north. e. the swimmer should swim due east.