Question

Which of the following radiation is most penetrating?

• A. $\alpha -particles$
• B. $\beta -particles$
• C. $\gamma -radiation$
• D. X-rays

Answer 1

The correct option is C

$\mathrm{\gamma }-\mathrm{radiation}$

C. $\mathrm{\gamma }-\mathrm{radiation}$

1. When the wavelength is shorter the penetrating power is more.
2. $\mathrm{\gamma }$ -rays have the shortest wavelength among the given options.
3. So, $\mathrm{\gamma }$ -rays have the highest penetrating power.

Thus, C is the correct option.