Physicseasy · Past Paper
What happens to the speed of light when it enters glass from air?
AIncreases
BDecreases
CRemains same
DBecomes zero
✓ Correct Answer: B — Decreases
Light travels slower in glass because glass is optically denser than air.
Share this question
More from Physics
- If a body moves with constant velocity, its acceleration-time graph will be:
- A body moves with constant acceleration 'a'. If its velocity at two points is 'u' and 'v', its velocity at the midpoint of the path is:
- A stone is dropped from the top of a tower of height h. After 1s another stone is dropped from 20m below the top. Both reach bottom together. Height h is (g=10):
- A cheetah can accelerate from rest to 25 m/s in 2 seconds. Its acceleration is:
- The drift velocity of electrons in a copper wire is of the order of: