Question

Consider $\alpha -particles,\beta -particlesand\gamma -rays$, each having an energy of 0.5 MeV. The increasing order of penetration power is:

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

Answer 1

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

As they have same energy and penetration power is directly proportional to 1/mass so their penetration power order is
$\alpha <\beta <\gamma$