When a pencil is placed in a glass of water, the pencil appears broken at the surface of the water. This is because the light: *
a. speeds up as it moves from water into air.
b. slows down as it moves from water into air.
c. stops when it hits the water.
d. does not change speed.
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Answer:
b
Explanation:
As you sight at the portion of the pencil that was submerged in the water, light travels from water to air (or from water to glass to air). This light ray changes medium and subsequently undergoes refraction. As a result, the image of the pencil appears to be broken.