Physics, 25.10.2020 14:00 tbggheemoney
When an ultraviolet radiation falls on a negative charged copper board, it ejects an electron from copper because
A)The frequency of the ultraviolet radiation is larger than the threshold frequency of copper.
B)The frequency of the ultraviolet radiation is smaller than the threshold frequency of copper.
C)The energy of the ultraviolet is smaller than the function of the copper.
D)The wavelength of the ultraviolet radiation is larger than the wavelength of the threshold of copper.
PLEASE HELP FAST
Answers: 3
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