Question

Why is a mirror an example of a poor blackbody radiator?

A.
It reflects most electromagnetic radiation instead of absorbing it.
B.
It gives off a range of wavelengths of electromagnetic radiation that depends on its temperature.
C.
It absorbs and gives off a range of wavelengths of electromagnetic radiation.
D.
It gives off only one wavelength of electromagnetic radiation.

Answer 1

A. it reflects most electromagnetic radiation instead of absorbing it.

Step-by-step explanation:

a p e x, just took the quiz

Answer 2

A

Step-by-step explanation:

Detailed balance, i.e. 2nd law of thermodynamics, requires a relationship between absorbing incoming radiation and turning it into heat, versus emitting thermal radiation. A perfect mirror at rest does not absorb any incoming radiation, therefore it is a "whitebody", not a blackbody, and emits no thermal radiation.