Question

define perfectly black body. ​

Answer 1

Answer:

A perfect blackbody is one that absorbs all incoming light and does not reflect any. At room temperature, such an object would appear to be perfectly black (hence the term blackbody). However, if heated to a high temperature, a blackbody will begin to glow with thermal radiation.

Answer 2

Answer:

Heya mate,

A perfectly black body is one which absorbs completely all the radiation falling on it's surface whatever be the wavelength.

Hope it helps you ☺☺