If the two metals A and B are exposed to radiation of wavelength 350   nm . The work functions of…

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
  1. Metal B will not emit photo-electrons
  2. Both metals A and B will emit photo-electrons
  3. Both metals A and B will not emit photoelectrons
  4. Metal A will not emit photo-electrons

Solution

As we know, for photoelectric emission, hν>ϕ.

Now,

hν=hcλ=1240350 eV=3.54 eV

Therefore, only metal B will emit photoelectrons.

Asked in: JEE Main 2023 (31 Jan Shift 2)

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