Question

A photon of wavelength 4x10-7 m strikes on
metal surface, The work function of the metal is 2.13eV. The velocity of the photo electron is....???(working)

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Answer 1

Explanation:

The velocity of a photoelectron (ν) can be calculated by the expression,

 



 

Where, (hv-hv0) is the kinetic energy of emission in Joules and ‘m’ is the mass of the photoelectron. Substituting the values in the given expression of v:



v = 5.84 × 105 ms–1

Hence, the velocity of the photoelectron is 5.84 × 105 ms–1.