Which of these statements is true for the radiation emitted by all objects?
A) Under the same circumstances, black objects emit the least radiation.
B) The higher an object's temperature, the longer the predominant wavelength of its radiation.
C) The higher an object's temperature, the more radiation it emits.
D) The higher an object's temperature, the higher the speed of the radiation it emits.

Question

Quizplus · Accepted Answer

This is known as Wien's displacement law, which states that as the temperature of an object increases, the amount of radiation it emits increases and the wavelength of the radiation decreases. Option A is false as black objects actually emit more radiation than lighter colored objects. Option B is false as higher temperature means shorter wavelength. Option D is false as the speed of radiation emitted is always constant at the speed of light.

Which of These Statements Is True for the Radiation Emitted