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Standard XII

Physics

Optical Fiber

Assertion :Di...

Question

Assertion :Diamonds are known for their spectacular brilliance, but diamonds found in nature rarely exhibit the brilliance. Reason: By cutting the diamond suitably, multiple total internal reflections can be made to occur.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
The critical angle for diamond-air interface is very small, therefore once light enters a diamond, it is very likely to undergo total internal reflection inside it. It is the technical skill of a diamond cutter which makes diamond to sparkle so brilliantly.
So option A is correct

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