If the two metals A and B are exposed to radiation of wavelength 350 nm, and the work functions of metals A and B are 4.8 eV and 2.2 eV respectively, choose the correct option:
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Question

If the two metals A and B are exposed to radiation of wavelength 350 nm, and the work functions of metals A and B are 4.8 eV and 2.2 eV respectively, choose the correct option:

G1 Physics · Accepted Answer

Photon energy E ≈ 1240/350 ≈ 3.54 eV. This exceeds 2.2 eV for B but is less than 4.8 eV for A. Therefore B emits photoelectrons and A does not.