The velocity of light will be minimum in

Options :
  1. vacuum
  2. air
  3. water
  4. glass
Answer and Explanation :-

Answer: Option 4

Explanation:

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Restlessness and impatience change nothing except our peace and joy. Peace does not dwell in outward things, but in the heart prepared to wait trustfully and quietly on Him who has all things safely in His hands.
-Elisabeth Elliot