NEET 2011 Physics question

Which of the following is not due to total internal reflection?

(1)working of optical fibre
(2)difference between apparent and real depth of pondCorrect
(3)mirage on hot summer days
(4)brilliance of diamond

Answer: (2)

Solution

Optical fibres work by repeated total internal reflection; a mirage occurs when light from the sky undergoes total internal reflection in the hot, rarer air layers near the ground; the brilliance of a

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Question ID VK-090928