WBJEE · Physics · Dual Nature of Matter
Monochromatic light of wavelength \(\lambda=4770 Ã…\) is incident separately on the surface of four different metals \(A, B, C\) and D. The work functions of \(A, B, C\) and D are \(4.2 \mathrm{eV}, 3.7 \mathrm{eV}, 3.2 \mathrm{eV}\) and 2.3 eV , respectively. The metal / metals from which electrons will be emitted is /are
- A A, B, C and D
- B B, C and D
- C C and D
- D D only
Answer & Solution
Correct Answer
(D) D only
Step-by-step Solution
Detailed explanation
Hint : \(\mathrm{E}_{\text {photon }}=\frac{\mathrm{hc}}{\lambda}=2.6 \mathrm{eV}\gt\) work function for photoelectons emission
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