Statement I : Coefficient of absorption of radiation of an ideal black body is 1.
Statement II : An ideal black body emits radiation of all wavelength

Moderate

A

If both statement I and statement II are true and statement II is the correct explanation of statement I.
B

If both statement I and statement II are true but statement II is not the correct explanation of statement I.
C

If statement I is true but statement II is false
D

If both statement I and statement II are false

Solution

We know that for ideal black body reflectance (r) = 0, transmittance (t) = 0, absorptance (a) = 1. It is clear that, when heated, the black body will radiate all the energy which is absorbed by it.

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