66. If a metal is bombarded with radiation having wavelength [tex]\(\lambda\)[/tex], electrons are emitted. If radiation of the same intensity but with a smaller wavelength than [tex]\(\lambda\)[/tex] is bombarded on the metal, what will be the observation?

A. The number of emitted electrons decreases.
B. The kinetic energy of emitted electrons decreases.
C. The number of emitted electrons increases.
D. The kinetic energy of emitted electrons increases.



Answer :

Final answer:

When a metal is bombarded with radiation of shorter wavelength than a threshold value, the kinetic energy of emitted electrons increases.


Explanation:

In the photoelectric effect, when a metal is bombarded with radiation of shorter wavelength than a threshold value, the kinetic energy of emitted electrons increases.

This observation is in line with the fact that changing the frequency of incoming light affects the kinetic energy of the ejected electrons. Lower wavelengths of radiation carry more energy, which results in higher kinetic energy of the emitted electrons.


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