Question

A star is an example of a blackbody radiator because:

A. it reflects most of the light falling on them.

B. it can neither emit nor absorb all wavelengths of light.

C. its spectrum shifts to short wavelengths as temperature increases.

D. its wavelength peaks in the blue end of the spectrum as temperature decreases.

Answer 1

Stars are considered blackbody radiators because they absorb and emit electromagnetic radiation across all wavelengths of the spectrum, making them effective absorbers and radiators. The color of an object determines its rate of heat transfer by radiation, with black being the most effective absorber and radiator.

Step-by-step explanation:

A star is considered an example of a blackbody radiator because it absorbs and emits electromagnetic radiation across all wavelengths of the electromagnetic spectrum. A blackbody object absorbs all radiated energy that strikes it and emits energy across all wavelengths. The rate of heat transfer by radiation is largely determined by the color of the object, with black being the most effective absorber and radiator. Therefore, even though stars shine brightly in a variety of colors, they are still considered blackbodies.