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Q.

(A) : The images formed by total internal
reflections are much brighter than those
formed by mirrors or lenses by reflection
or refraction.
(R) : There is no loss of intensity in total internal
reflection.

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a

'A' is true and 'R' is false

b

Both 'A' and ‘R’ are false

c

Both 'A' and 'R' are true and 'R' is not the correct explanation of 'A

d

Both 'A' and 'R' are true and 'R' is the correct explanation of 'A'.

answer is A.

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Detailed Solution

In total internal reflection, 100% of incident light is reflected back into the same medium, and there is no loss of intensity, while in reflection from mirrors and refraction from lenses, there is always some loss of intensity. Therefore images formed by total internal reflection are much brighter than those formed by mirrors or lenses.
So,Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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(A) : The images formed by total internal reflections are much brighter than thoseformed by mirrors or lenses by reflectionor refraction. (R) : There is no loss of intensity in total internal reflection.