Question

Which among the following is/are correct about penetrating power?

• A. $\alpha$ - rays are less penetrating than $\beta$ -rays.
• B. $\beta$ -rays are less penetrating than $\gamma$-rays.
• C. $\alpha ,\beta ,\gamma$ - rays have equal penetrating power.
• D. $\gamma$-rays are most penetrating.

Answer 1

Answer: (A), (B), (D)

The correct options are
A $\alpha$ - rays are less penetrating than $\beta$ -rays.
B $\beta$ -rays are less penetrating than $\gamma$-rays.
D $\gamma$-rays are most penetrating.

Answer:

Gamma rays have so much penetrating power that several inches of a dense material like lead, or even a few feet of concrete may be required to stop them. Gamma rays can pass completely through the human body; as they pass through, they can cause ionizations that damage tissue and DNA

Order of penetrating power is as follows:

$\gamma rays>\beta rays>\alpha rays$

Option A,B and D is correct