. A sub-atomic particle of mass 10 -30 kg is moving with a velocity 2.21 × 10 6 m / s . Under the matter wave consideration, the particle will behave closely like . ( h =6.63 × 10 -34 J . s )

Physics · Atomic Physics

JEE Main 2025 — 23 January, Morning Shift — Question 52

. A sub-atomic particle of mass $10^{-30} \mathrm{~kg}$ is moving with

a velocity $2.21 \times 10^{6} \mathrm{~m} / \mathrm{s}$ . Under the matter

wave consideration, the particle will behave closely like

$\qquad$ . $\left(\mathrm{h}=6.63 \times 10^{-34} \mathrm{~J} . \mathrm{s}\right)$

Option A:
Infra-red radiation
Option B:
X-rays
Correct
Option C:
Gamma rays
Option D:
Visible radiation

Answer: B

Step-by-step solution

$\quad \lambda=\frac{\mathrm{h}}{\mathrm{p}}=\frac{6.63 \times 10^{-34}}{10^{-30} \times 2.21 \times 10^{6}}$ $=3 \times 10^{-10} \mathrm{~m}$ Hence particle will behave as x-ray.

Answer key and solution verified before publishing.

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Exam: JEE Main 2025
Paper: 23 January, Morning Shift
Subject: Physics
Chapter: Atomic Physics
Topic: Dual Nature of Matter