An energy of 4 10 -19 J is required to remove an electron from the surface
Question:
An energy of 4 × 10-19 J is required to remove an electron from the surface of a particular metal.
(a) What is the frequency of the light that will just dislodge electrons from the surface?
(b) What is the maximum energy of electrons emitted through the action of light of wavelength 2 × 10-7 m?
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