If the two metals A and B are exposed to radiation of wavelength 350 nm . The work functions of metals A and B are 4 . 8 eV and 2 . 2 eV . Then choose the correct option

Question

If the two metals A and B are exposed to radiation of wavelength 350 nm . The work functions of metals A and B are 4 . 8 eV and 2 . 2 eV . Then choose the correct option, Metal B will not emit photo-electrons, Both metals A and B will emit photo-electrons, Both metals A and B will not emit photoelectrons, Metal A will not emit photo-electrons

MARKS App · Accepted Answer

As we know, for photoelectric emission, h ν > ϕ . Now, h ν = h c λ = 1240 350 eV = 3 . 54 eV Therefore, only metal B will emit photoelectrons.

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