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Photoelectric Effect

What is the m...

Question

What is the maximum kinetic energy of the electron ejected when light of frequency $3.5 \times 10^{15} H z$ falls on a metal having threshold frequency $1.5 \times 10^{15} H z$ ?

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Solution

energy of incident electron $= h V = 14.5 e V$
work function of metal $= h V_{T h} = 6.2 e V$
$∴$ max energy of ejected electron $= 8.3 r V$

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