Concept explainers
To Explain: High-intensity low-frequency light is not able to emit electrons from metal but low-intensity high-frequency light can emit electrons.
Explanation of Solution
Introduction:
The threshold energy is the factor that is considered in
The photo electric effect exhibits particle nature of light where threshold energy plays a crucial role.
As stated the energy of light particle (photon) is
As per photoelectric effect
Photoelectric effect is a phenomenon in which an incident ray falls on a shiny metal surface and electrons are ejected. The incident energy should be at least equal to the threshold energy. So, when
Intensity affects the amount of photocurrent but whether an electron would eject or not depends on the frequency of the incident
Conclusion:
The low intensity, high frequency light is able to eject the electron is because the frequency of photon is more than threshold frequency whereas, high − frequency, low frequency cannot reach threshold limit.
Chapter 27 Solutions
Glencoe Physics: Principles and Problems, Student Edition
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