SBA — Single Best Answer · Review
Question 589
Biophysics → General
Classification
Question
SSBAQuestion Header
Which statement most accurately distinguishes the origin of gamma rays from X-rays?
Question Stem
Select the single best answer.
Options
A
Gamma rays are electrons whereas X-rays are photons
B
X-rays originate from the nucleus whereas gamma rays arise from circulating electrons
C
Gamma rays and X-rays differ because only X-rays are ionising
D
Gamma rays arise from the nucleus during gamma decay, whereas X-rays are generated through electron interactions
E
Gamma rays are positively charged whereas X-rays are electrically neutral
Explanation
Both gamma rays and X-rays are ionising electromagnetic radiation. Gamma rays are high-energy photons originating from the nucleus during gamma decay, whereas X-rays are generated through electron interactions, including deceleration producing Bremsstrahlung radiation.
Option Validity
A) Both gamma rays and X-rays are electromagnetic photons rather than electrons.
B) Their origins are reversed.
C) Both forms are ionising radiation.
E) Gamma rays are electromagnetic radiation and do not carry a positive charge.
Further Reading
Saxena R. Textbook for MRCOG-1. Chapter 9: Biophysics, pp.278–279.