What happens when light crosses the boundary of two media with varying optical density?
A. It's speed changes
B.its direction changes
C.its appearance changes
D it's temperature changes
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Answer:
Correct option is A ( it's speed changes)
Explaining
The refraction occurs at the boundary and is caused by a change in the speed of the light wave upon crossing the boundary. ... The speed of a light wave is dependent upon the optical density of the material through which it moves.
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