Question

X-rays have higher penetrating power as they travel with very high velocity.

• A. True
• B. False

Answer 1

The correct option is B False

Given:-$X$ -rays have high penetrating power.

Solution:-$X$ -rays have high frequencies of the

range:-${10}^{16}{H}_Z-{10}^{20}{H}_Z$

According to Planck's equation for energy of a photon,

$E=h\upsilon$

$E$= Energy of photone

$h$=planck's constant=$6.63\times {10}^{-34}Js$

$\upsilon$=Frequence of photone in Hertz

Hence, energy of a photone, $E$ is directly propotional to the frequnence of a photone,$\upsilon$

$E\propto \upsilon$

Now,since $X$-rays have high frequency, consequently they have high energy.

And therefore high penetrating power.

$\therefore$ $X$-rays have high penetrating power because of their high frequency.