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

(a) Working of optical fibre 

(b) Difference between apparent and real depth of a pond 

(c) Mirage on hot summer day 

(d) Brilliance of diamond

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(b) Difference between apparent and real depth of a pond 

Difference between apparent and real depth of a pond is due to refraction of light and the other three phenomena involve total internal reflection.

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