JEE Mains · Physics · STD 12 - 11. Dual nature of radiation and matter
\(UV\) light of \(4.13 \mathrm{eV}\) is incident on a photosensitive metal surface having work function \(3.13 \mathrm{eV}\). The maximum kinetic energy of ejected photoelectrons will be _______.
- A \(4.13 \mathrm{eV}\)
- B \(1 \mathrm{eV}\)
- C \(3.13 \mathrm{eV}\)
- D \(7.26 \mathrm{eV}\)
Answer & Solution
Correct Answer
(B) \(1 \mathrm{eV}\)
Step-by-step Solution
Detailed explanation
\(\mathrm{E}_{\text {photon }}=\text { (work function) }+\mathrm{K} \cdot \mathrm{E}_{\max }\) \(\therefore 4.13=3.13+\mathrm{K} \cdot \mathrm{E}_{\max }\) \(\therefore \mathrm{K} \cdot \mathrm{E}_{\max }=1 \mathrm{eV}\)
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