AP EAMCET · PHYSICS · Dual Nature of Matter
All electrons ejected from a metallic surface by incident light of wavelength \(400 \mathrm{~nm}\) travelled \(1 \mathrm{~m}\) in the direction of uniform electric field of \(2 \mathrm{NC}^{-1}\) and came to rest. The work function of the surface is
- A \(1.1 \mathrm{eV}\)
- B \(2.2 \mathrm{eV}\)
- C \(3.1 \mathrm{eV}\)
- D \(5.1 \mathrm{eV}\)
Answer & Solution
Correct Answer
(A) \(1.1 \mathrm{eV}\)
Step-by-step Solution
Detailed explanation
Given, wavelength of incident radiation, \(\lambda=400 \mathrm{~nm}=4 \times 10^{-7} \mathrm{~m}\) electric field, \(E=2 \mathrm{~N} / \mathrm{C}\) and distance, \(s=1 \mathrm{~m}\) \(\therefore\) Energy of the incident light,…
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