Dual Nature of Radiation and Matter - Result Question 16
17. Which of the following moving particles (moving with same velocity) has largest wavelength of matter waves?
[2002]
(a) Electron
(b) $\alpha$-particle
(c) Proton
(d) Neutron
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Answer:
Correct Answer: 17. (a)
Solution:
- (a) de-Broglie wavelength $\lambda=\frac{h}{m v}$
For same velocity, $\lambda \propto \frac{1}{m}$
Out of given particles, the mass of electron is minimum, so the associated de-Broglie wavelength is maximum for electron.
