Question

A black body is a perfect absorber and a perfect emitter of radiation.

• A. True
• B. False

Answer 1

The correct option is A

True

A blackbody is a hypothetical, ideal body, which is a perfect absorber and a perfect emitter of radiation.

$\Rightarrow$ In other words - a blackbody refers to an opaque object that emits thermal radiation. A perfect blackbody is one that absorbs all the incoming light and does not reflect any. At room temperature, such an object would appear to be perfectly black (hence the term blackbody).