What happens to the speed of light as it passes from air into a denser medium like glass?

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It increases
It decreases
It remains the same
It becomes zero

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Q: What happens to the speed of light as it passes from air into a denser medium like glass?

Solution: The speed of light decreases when it passes from a less dense medium (air) to a denser medium (glass) due to the change in refractive index.

Steps: 5

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.

What happens to the speed of light as it passes from air into a denser medium like glass?

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