Question

What is Black Body example?

Answer 1

Black body:

• The Black body is defined as a surface that absorbs all the radiant light or energy that falls on it.
• We can also say that anybody that absorbs all the electromagnetic radiation irrespective of the angle of incidence and the frequency of radiation is called a Black body.

Examples:

• Black holes are near-perfect black bodies.
• A super-black material that absorbs 99.9% of light is a nickel-phosphorus alloy that is chemically prepared and is vertically aligned to the carbon nanotube arrays.
• Sun and a piece of charcoal are approximately a perfect body. They do not allow the light to reflect from their surface once absorbed.

An ideal black body is in thermal equilibrium when it emits electromagnetic radiation. It has two properties - As an ideal emitter and as a diffuse emitter.