Q. Which can pass through $20\ cm$ thickness of the steel
A) $\alpha -$particles
B) $\beta -$particles
C) $\gamma -$rays
D) Ultraviolet rays
Explanation
(c) $\gamma$-rays are highly penetrating
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.