Which of the following does not require the quantum theory of light for its explanation?
A)the photoelectric effect
B)the corpuscular nature of light
C)radiation from a cavity
D)diffraction
E)the hydrogen spectrum

Question

Quizplus · Accepted Answer

Diffraction is a phenomenon that can be explained using the wave theory of light, which predates quantum theory. It involves the bending of light waves around obstacles and the spreading out of waves when they pass through small openings, which can be understood without invoking quantum mechanics.

Which of the Following Does Not Require the Quantum Theory