From the following list of observations, choose the one that most clearly supports the conclusion that electromagnetic radiation has wave characteristics.
A) diffraction
B) the emission spectrum of hydrogen
C) the scattering of alpha particles by metal foil
D) cathode "rays"
E) the photoelectric effect

Question

Quizplus · Accepted Answer

Diffraction is a characteristic property of waves, where waves bend around obstacles and spread out after passing through a small opening. The fact that electromagnetic radiation exhibits diffraction provides evidence that it has wave-like properties.

From the Following List of Observations, Choose the One That