Question

The penetrating powers of $\alpha ,\beta$ and $\gamma$-radiations are in the order:

• A. $\alpha >\beta >\gamma$
• B. $\alpha <\beta <\gamma$
• C. $\alpha =\beta =\gamma$
• D. $\beta >\gamma >\alpha$

Answer 1

The correct option is B $\alpha <\beta <\gamma$

Gamma rays are the most penetrating of all the radiations. As penetrating depends on the size of particles, bigger the size lesser the penetration power and $\alpha$ particles are bigger in size followed by $\beta$ and then $\gamma$. Also, $\gamma$ rays are highly energetic waves having higher frequency.