Ultraviolet light is incident on two photosensitive materials having work functions W1 and W2 (W1 > W2). In which case will kinetic energy of the emitted electron be greater ? Why ?

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Ultraviolet light is incident on two photosensitive materials having work functions W₁ and W₂ (W₁ > W₂). In which case will kinetic energy of the emitted electron be greater ? Why ?

Asked by Topperlearning User | 19 May, 2014, 04:04: PM

Expert Answer

From Einstein"s photoelectric equation h = W + E_K

E_K = h - W

Clearly, smaller the work function, greater the K.E.

As W₁ > W2, K.E for metal of work function W₂ will be greater.

Answered by | 19 May, 2014, 06:04: PM

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