Which of the following is an example of an electromagnetic wave?
A. ripples on a lake
B. the honking of a car horn
C. the light from a neon sign
D. aftershocks from an earthquake
It would be C. EM is GXUVIMR. Gamma, X-ray, Ultraviolet, visible, infrared, microwave, and radio waves (respectively). C is the only one that comes from any of those, because it is a reflection of light in the visible range of the EM spectrum.
