The important breakthrough in theoretical physics that was first suggested by Planck to explain the shape of the spectrum of a hot body was the:
A) discovery of the formula F = σT⁴, which can be used to calculate the total energy flux emitted by the hot body over all wavelengths.
B) idea that light traveled at a constant speed, whatever the speed of the source.
C) idea that light is a form of electromagnetic energy transmitted at a constant speed and that there is a continuous spectrum of electromagnetic waves from gamma rays to radio waves.
D) concept that electromagnetic energy was emitted in small packets, or quanta.

Question

Quizplus · Accepted Answer

Planck's idea that electromagnetic energy was emitted in small packets, or quanta, led to the development of quantum mechanics and revolutionized our understanding of the behavior of light and matter on a microscopic scale. This idea explained the shape of the spectrum of a hot body, known as the blackbody spectrum, and was a major breakthrough in theoretical physics. The other choices are not directly related to Planck's original idea.

The Important Breakthrough in Theoretical Physics That Was First Suggested