WBJEE · Physics · Dual Nature of Matter
The work function of metals is in the range of \(2 \mathrm{eV}\) to \(5 \mathrm{eV}\). Find which of the following wavelength of light cannot be used for photoelectric effect? (Consider, Plank constant \(=4 \times 10^{-15} \mathrm{eVs},\) velocity of light \(\left.=3 \times 10^{8} \mathrm{m} / \mathrm{s}\right)\)
- A \(510 \mathrm{nm}\)
- B \(650 \mathrm{nm}\)
- C \(400 \mathrm{nm}\)
- D \(570 \mathrm{nm}\)
Answer & Solution
Correct Answer
(B) \(650 \mathrm{nm}\)
Step-by-step Solution
Detailed explanation
Given that, \(2 \mathrm{eV} \leq \phi \leq 5 \mathrm{eV}\) Wavelength corresponding to minimum and maximum values of work function are…
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