Question

Calculate the threshold frequency of photon for photoelectric emission from a metal of work function 0.1 ev?

Answer 1

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Answer 2

The threshold frequency of the photon is $2.41\times 10^{13}\ Hz$

Explanation:

Work function of the metal, $W=0.1\ eV=0.1\times 1.6\times 10^{-19}\ J=1.6\times 10^{-20}\ J$

The work function of a metal is defined as the energy required to pull electron from it. It is given by :

$W=hf$

f is the threshold frequency of photon

$f=\dfrac{W}{h}\\\\f=\dfrac{1.6\times 10^{-20}}{6.63\times 10^{-34}}\\\\f=2.41\times 10^{13}\ Hz$

So, the threshold frequency of the photon is $2.41\times 10^{13}\ Hz$.

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Photoelectric emission

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