Physics, 20.05.2021 15:20 reyrey216

In which of the following situations is the photoelectric effect being demonstrated? A.
An electron within an atom absorbs energy when it is hit by a photon and jumps to a higher energy level within the atom.
B.
An electron moves through a sea of electrons within a block of aluminum atoms when a voltage is applied to the metal.
C.
A photon of light travels at the speed of light in a vacuum but moves slightly slower through a medium made of matter.
D.
The color of a substance is determined by the wavelength of electromagnetic radiation that is reflected off of its surface

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In which of the following situations is the photoelectric effect being demonstrated? A.
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