MCQ
If travelling at same speeds, which of the following matter waves have the shortest wavelength?
- AElectron.
- ✓Alpha particle $\ce{(He}^{2+})$
- CNeutron.
- DProton.
✓
Answer
Correct option: B.
Alpha particle $\ce{(He}^{2+})$
$\lambda=\frac{\text{h}}{\text{mv}}=\frac{\text{h}}{\text{p}}$
Higher the mass, shortest is the wavelength. Since alpha particles have the highest mass, they have shortest wavelength.
Higher the mass, shortest is the wavelength. Since alpha particles have the highest mass, they have shortest wavelength.
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