Question

What Is Black Body Example?

Answer 1

Hint:Blackbody, in physics, a surface that receives all radiant energy coming on it. The term originates because visible incident light will be received rather than reflected, and therefore the surface will look black. The concept of such a perfect energy absorber is beneficial in studying radiation phenomena.

Complete step-by-step solution:
The Sun is the fundamental source of electromagnetic radiation on the Earth, but all objects warmer than absolute zero reflect, receive and release electromagnetic energy. The quantity of electromagnetic radiation an object releases depends fundamentally on its temperature. The more the temperature of an object, the quicker its electrons vibrate and the greater the energy released.
A blackbody is a theoretical body that receives all electromagnetic radiation falling on it. It is a theoretical object which is a perfect absorber and a perfect emitter of wavelengths of radiation. The term originates because all visible light will be absorbed for a blackbody rather than reflected, and therefore the surface will appear black. A star, like the Sun, is a near-perfect blackbody. A blackbody does not reflect light, nor does it permit any light to pass through (transmit). A black body is described as a body that absorbs all the electromagnetic radiation (that is, light) that strikes it irrespective of the radiation angle and frequency.
A black body can also be under thermal equilibrium in which it releases electromagnetic black body radiation, which is based on Planck’s law.
Example of Black Body
A cavity with a hole in it is an excellent example of the black body. When light is incident on the cavity, the light enters through the hole, but no light is reflected.
The radiation released by the black body is known as black body radiation.

Note:There are two characteristics of an ideal black body in thermal equilibrium: Ideal emitter: The quantity of thermal radiative energy released by the body is more than any other body at the equal temperature and any frequency and Diffuse emitter: This is estimated as a unit area that is normal to the direction.