Sir William Hershel passed a beam of sunlight through a prism and held a thermometer just beyond the end of the visible spectrum.The thermometer registered a temperature increase,indicating that it was being exposed to an invisible form of energy that is now called
A) radio waves.
B) microwaves.
C) infrared light.
D) ultraviolet light.

Question

Quizplus · Accepted Answer

The invisible form of energy detected by the thermometer is in the region just beyond the visible spectrum, which is known as infrared light. Therefore, choice C, infrared light, is the best choice. The other choices (radio waves, microwaves, and ultraviolet light) are not in the region just beyond the visible spectrum and would not be detected in this experiment.

Sir William Hershel Passed a Beam of Sunlight Through a Prism