The work function of a material is 5.3 eV and the stopping potential for a radiation incident on this surface is 4.2 V. The energy of a quantum of incident radiation is

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1.1 eV

9.5 eV

5.3 eV

4.2 eV

answer is B.

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Detailed Solution

E = Wo + KEmax = Wo + eVs = 5.3 eV + e(4.2V) = 5.3 eV + 4.2 eV = 9.5 eV

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