Question

The work functions for metals A, B and C are respectively 1.92 eV, 2.0 eV and 5eV. According to Einstein's equation, the metals which will emit photo electrons for a radiation of wavelength 4100˙A is/are-

Answer 1

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PHYSICS

The work function for metals A, B and C are respectively 1.92 eV, 2.0 eV and 5eV. According to Einstein's equation, the metals which will emit photoelectrons for a radiation of wavelength 4100

A

˚

is/are :

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VIDEO EXPLANATION

ANSWER

Energy of electron with an associated wavelength of 4100A

∘

is:

⇒

λ

hc

=4.845×10

−19

J

=3.024eV

This incident electron would emit photon from metals whose work potential is less than its energy.

Thus, it would emit photons from metals A and B.