The speed of light in water compared to the speed of light in a vacuum is
A)slower.
B)faster.
C)the same.
D)can be faster or slower depending on the color.
E)can be faster or slower depending on the intensity.

Question

Quizplus · Accepted Answer

The speed of light in water is slower than the speed of light in a vacuum. This is because water has a higher refractive index compared to air, which causes it to slow down the speed at which light travels through it. The speed of light in water is slower than in a vacuum, as the refractive index of water is greater than 1, which increases the path length of light waves in water, hence reducing their speed.

The Speed of Light in Water Compared to the Speed