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Which of the following statements about photoelectrons is&nb...
physics waec-physics-2020 ssce-exam-2020 waec-2020
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Which of the following statements about photoelectrons is correct?

A. A faint green light produces photoelectrons with less kinetic energy that a bright red light

B. A red light releases a smaller number of electrons that a green light

C. A faint green light produces photoelectrons with greater kinetic energy than a bright red light

D. A red light produces more photoelectrons than a green light

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peter
Asked by peterrep:1.6K
University of Lagos Nigeria
29 August 2020

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dp
love4real,
in the hydraulic press the force f applied is related t the diameter d of the cylinder by
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judziy
Judziy answeredrep:1.8K
University of Benin Nigeria
14 September 2020
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The photoelectric effect is a phenomenon that occurs when light shined onto a metal surface causes the ejection of electrons from that metal. It was observed that only certain frequencies of light are able to cause the ejection of electrons. If the frequency of the incident light is too low (red light, for example), then no electrons were ejected even if the intensity of the light was very high or it was shone onto the surface for a long time. If the frequency of the light was higher (green light, for example), then electrons were able to be ejected from the metal surface even if the intensity of the light was very low or it was shone for only a short time. 

 

Answer: B

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