Question:
The work functions for metals A,B and C are respectively 1.92 eV, 2.0 eV and 5 eV. According to Einstein's equation, the metals which will emit photoelectrons for a radiation of wavelength 4100 Å is/are:
The work functions for metals A,B and C are respectively 1.92 eV, 2.0 eV and 5 eV. According to Einstein's equation, the metals which will emit photoelectrons for a radiation of wavelength 4100 Å is/are:
Updated On: Aug 1, 2024
none
A only
A and B only
all the three metals
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The Correct Option is C
Solution and Explanation
Energy of electron with wavelength of 4100A° is
\(\frac{hc}{\lambda}\) = 4.845x10-19J
= 3.024eV
This incident electron would emit photon from metals whose work potential is less than its energy.
so, it would emit photons from metals A and B.
Therefore, the correct option is (C): A and B only
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