What happens to the speed of light as it passes from air into a denser medium like glass?
Correct Answer: The speed of light decreases.
- Step 1: Understand that light travels at a certain speed in air, which is faster than in other materials.
- Step 2: Recognize that air is less dense than glass.
- Step 3: When light moves from air (less dense) into glass (denser), it encounters more particles.
- Step 4: These particles in glass slow down the light as it passes through.
- Step 5: This slowing down of light results in a decrease in its speed.
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