COMEDK · Physics · 27. Dual Nature of Matter
The momentum of electrons having a wavelength \(2 Å\) (given, \(h=6.626 \times 10^{-34} \mathrm{~J}\)-s, \(\left.m=9.1 \times 10^{-35} \mathrm{~kg}\right)\) is
- A \(6.313 \times 10^{-24} \mathrm{~kg}^{-\mathrm{m} \mathrm{s}^{-1}}\)
- B \(3.313 \times 10^{-24} \mathrm{~kg}-\mathrm{m} \mathrm{s}^{-1}\)
- C \(9.313 \times 10^{-25} \mathrm{~kg}-\mathrm{m} \mathrm{s}^{-1}\)
- D \(12.313 \times 10^{-24} \mathrm{~kg}-\mathrm{m} \mathrm{s}^{-1}\)
Answer & Solution
Correct Answer
(B) \(3.313 \times 10^{-24} \mathrm{~kg}-\mathrm{m} \mathrm{s}^{-1}\)
Step-by-step Solution
Detailed explanation
Given, \(h=6.626 \times 10^{-34} \mathrm{~J}-\mathrm{s}\) \(m=9.1 \times 10^{-35} \mathrm{~kg}\) Wavelength, \(\lambda=2 Å\) \(=2 \times 10^{-10} \mathrm{~m}\) \(\therefore\) Momentum of electron is given as…
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