JEE Mains · Physics · STD 12 - 11. Dual nature of radiation and matter
Given figure shows few data points in a photo electric effect experiment for a certain metal. The minimum energy for ejection of electron from its surfface is\(.......eV\) (Plancks constant \(\left. h =6.62 \times 10^{-34}\, J . s \right)\)
- A \(2.27\)
- B \(2.59\)
- C \(1.93\)
- D \(2.10\)
Answer & Solution
Correct Answer
(A) \(2.27\)
Step-by-step Solution
Detailed explanation
Graph of \(V_{s}\) and \(f\) given \((B\,5.5,0)\) \(hv =\phi+ eV _{ s }\) at \(B \quad V _{ s }=0, \quad v=5.5\) \(\Rightarrow \quad h \times 5.5 \times 10^{14}=\phi\) \(\phi=\frac{6.62 \times 10^{-34} \times 5.5 \times 10^{14}}{1.6 \times 10^{-19}} eV =2.27 eV\)
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