Question

Black surface is a ___________ absorber.

Answer 1

Hint: You may basically think of the known facts on black objects. You may think of the felt on a hot sunny day while wearing black clothes. You could thus recall the known facts about these black surfaces, their known properties, etc. You could also give examples to relate to this fact and there by giving a good justification to support your statement.

Complete step-by-step solution:
In the question we are supposed to find what is absorbed by black surfaces.
The black surfaces are always known to be great absorbers as well as emitters of heat.
Also, these black surfaces are also known to absorb almost all the light. As we know absorbed lights would be converted to thermal energy and this energy is emitted out as heat. So, we could make this conclusion that the more the light that is absorbed, the more will be the heat that is emitted. You could relate to this fact if you have worn a black dress on a hot sunny day. You might have felt so hot that day.
Hence, we could make this conclusion: Black surface is a good absorber.

Note: You may recall Kirchoff's law that states that all good absorbers could be categorized as good emitters and vice versa. Also, any black object is known to absorb all sorts of wavelengths but none of them are reflected and hence they appear black. Unlike this, white objects reflect all wavelengths of light.