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Q.

A heated body emits radiation which has maximum intensity at frequency vm. If the temperature of the body is doubled,

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a

the maximum intensity radiation will be at frequency (2Vm)

b

the maximum intensity radiation will be at frequency (Vm/2)

c

the total emitted energy will increase by a factor 1.6

d

the total emitted energy will increase by a factor 2

answer is A.

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Detailed Solution

According to Wien's law,λmT= constantor T/vm= constant When Tis doubled, vm is also doubled, i.e., (2Vm)According to Stefan's law, E∝T4When T is doubled, E is increased by a factor of 16.
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