If light of wavelength of maximum intensity emitted from surface at temperature T₁ is used to cause photoelectric emission from a metallic surface, the maximum kinetic energy of the emitted electron is 6 eV, which is 3 times the work function of the metallic surface. If light of wavelength of maximum intensity emitted from a surface at temperature T₂ (T₂ = 2T₁) is used, the maximum kinetic energy of the photoelectrons emitted is :-
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Question

If light of wavelength of maximum intensity emitted from surface at temperature T₁ is used to cause photoelectric emission from a metallic surface, the maximum kinetic energy of the emitted electron is 6 eV, which is 3 times the work function of the metallic surface. If light of wavelength of maximum intensity emitted from a surface at temperature T₂ (T₂ = 2T₁) is used, the maximum kinetic energy of the photoelectrons emitted is :-

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G1 Physics · Accepted Answer

Step 1: Photon energy is Eγ = hc/λ and Einstein's equation is Kₘₐₓ = Eγ−φ. Step 2: If a stopping potential is involved, Kₘₐₓ = eVₛ. Step 3: Using the two stated cases eliminates φ or gives it directly. Final: C: 14 eV.