When a light beam emerges from water into air,the average light speed
A)increases.
B)decreases.
C)remains the same.

Name: When a light beam emerges from water into air,the average light speed A)increases. B)decreases. C)remains the same.
Brand: Quizplus
Rating: 4.8 (40 reviews)

Question

Quizplus · Accepted Answer

The average light speed in a medium depends on the refractive index of the medium. As the refractive index of air is lower than the refractive index of water, the speed of light increases when it passes from water to air. Therefore, the correct choice is A.

When a Light Beam Emerges from Water into Air,the Average