Home Physics Atomic and Nuclear Physics Radioactivity A radioactive substance emits
Physics Atomic and Nuclear Physics Radioactivity Single Correct MCQ
Published on: September 12, 2026

A radioactive substance emits

A
α α -rays
B
β β -rays
C
γ γ -rays
D
All of these

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Text Solution

Verified by Experts
The correct answer is:
D
Step 1: Understand the types of radiation emitted by radioactive substances.
A radioactive substance can emit three primary types of radiation:
  • α-rays: These are helium nuclei (two protons and two neutrons) and are relatively heavy and carry a positive charge.
  • β-rays: These are electrons (or positrons) emitted from a nucleus during decay processes and are lighter than α-particles.
  • γ-rays: These are high-energy electromagnetic waves emitted from radioactive decay, and they have no mass or charge.
Step 2: Realize that different radioactive substances can emit one or more of these types of radiation depending on the decay process and the nature of the substance.
Conclusion: Since a radioactive substance can emit α, β, and γ rays depending on the decay process, the correct answer is All of these. Therefore, the correct answer is D.

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