Question

Which statement is incorrect

• A. $\alpha$ -rays have more penetrating power than $\beta$ -rays
• B. $\alpha$-rays have less penetrating power than $\gamma$ -rays
• C. $\beta$ -rays have less penetrating power than $\gamma$ -rays
• D. $\beta$ -rays have more penetrating power than $\alpha$ -rays

Answer 1

The correct option is A $\alpha$ -rays have more penetrating power than $\beta$ -rays

The order of penetrating power is : $\alpha <\beta <-\gamma$ rays. It is due to lower mass and high speed.