Which of the following statements about infrared radiation is TRUE?
A) it is the band of the electromagnetic spectrum where each wave or photon has the greatest energy
B) it was first discovered in 1800 in an experiment using sunlight and thermometers
C) unlike light, infrared can never travel as fast as the speed of light
D) while many stars give off infrared, there is nothing on Earth at the right temperature to emit it
E) it is the radiation responsible for giving sunburns (or in large doses, skin cancer)

Question

Quizplus · Accepted Answer

Infrared radiation was first discovered in 1800 in an experiment using sunlight and thermometers. The other statements are false: A) the band of the electromagnetic spectrum with the greatest energy is gamma rays, not infrared; C) all forms of electromagnetic radiation travel at the speed of light in a vacuum, including infrared; D) many objects on Earth, including humans, emit infrared radiation; E) ultraviolet radiation, not infrared, is responsible for sunburns and skin cancer.

Which of the Following Statements About Infrared Radiation Is TRUE