2024HSCMultiple choice

Q14

1 mark

Question

The velocity of a proton ( ${}^1_1\mathrm{H}$ ) is twice the velocity of an alpha particle ( ${}^4_2\mathrm{He}$ ). The proton has a de Broglie wavelength of $\lambda$ .

What is the de Broglie wavelength of the alpha particle?
A. $\frac{\lambda}{8}$
B. $\frac{\lambda}{2}$
C. $2\lambda$
D. $8\lambda$

Try the question before revealing the answer.

Syllabus alignment

Module 7 · The Nature of Light

Light and Special RelativityApply relativistic momentum and mass-energy equivalence to physical situations.

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