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Question
Write Einstein’s photoelectric equation?
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Solution
Einstein’s photoelectric effect equation:
(NOTE: Use any one of three given equations)
hv = φ0 + K.E
where, h = Planck's constant, v = frequency of the incomig photons
φ0 = work function of the material and K.E = kinetic energy of the emitted electrons
or
`hv = phi_0 + 1/2 mv_max^2 `=
where,h = Planck's constant,v = frequency of the incoming photons
φo = work function of the material, 1/2 mv_max^2`kinetic energy of the emitted electrons
Vmax = maximum velocity of emitted electron
or
`1/2 mv_max^2 = h(v - v_o)`
where h = Planck's constant, v = frequency of the incoming photons
vo = threshold frequency, `1/2 mv_max^2= ` kinetic energy of the emitted electrons
vmax = maximum velocity of emitted electron
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