Passage IV

A blackbody is an object that absorbs all of the radiation that strikes it. The blackbody also emits radiation at all wavelengths; the emitted radiation is called blackbody radiation. The brightness of blackbody radiation at a given wavelength depends on the temperature of the blackbody. A graph of brightness versus wavelength for a blackbody is called a blackbody curve. Blackbody curves for the same blackbody at 3 different temperatures are shown in the figure below.

22. The frequency of radiation increases as the radiation’s wavelength decreases. Based on this information, over all wavelengths in the figure, as the frequency of the radiation from a blackbody increases, the brightness of the radiation:

Answer and Explanation

Your Answer is

Correct Answer is H

Explanation

According to the question stem, the frequency increases, that is, the wavelength decreases. Looking at the picture, as the abscissa wavelength decreases, the ordinate brightness first increases and then decreases