A small ball is attached to one end of a massless, rigid rod. The ball and the rod revolve in a horizontal circle with the other
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Answer:
(a) The work function is 1.86 eV.
(b) The cut off frequency is 450 THz.
(c) The stopping potential is 1.16 V.
Explanation:
incident wavelength = 620 nm
Kinetic energy, K = 0.14 eV
According to the photoelectric equation
E = W + KE
where, W is the work function, KE is the kinetic energy.
(a) Let the work function is W.
(b) Let the cut off frequency is f.
W = h f
(c) Let the stopping potential is V.