Question

which option is the best blackbody radiator?
a. boiling water
b. the sun
c. a tennis ball
d. a red laser pointer

Explanation:

A black - body is an idealized object that absorbs all incident electromagnetic radiation and emits radiation according to its temperature. The Sun is a near - perfect black - body radiator among the given options. Boiling water has a relatively low temperature and is not a good black - body radiator. A tennis ball is a non - radiative object in the context of black - body radiation. A red laser pointer emits light through stimulated emission, not black - body radiation.

Answer:

B. The Sun