Question

(a)
The threshold frequency y, for a metal is 9.0 x 104 Hz. Calculate
the kinetic energy of photoelectron emitted when radiation of
frequency y = 2.0 x 1015 Hz hits the surface of metal. Find the
velocity of photoelectron emitted.​

Answer 1

hence,

Kinetic energy = 72.93x10^(-19) J = 45.6 eV

and velocity of electron = 4x10^6 m/s

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