Which of the following equations represents the velocity ( v ) of the ejected electrons when a metal is made to strike with light of frequency v and the threshold frequency of the metal is v 0 ? m e = mass of electron and h is Planck's constant).

Question

Aicharya · Accepted Answer

As in case of photoelectric effect, incident radiation energy is equal to the sum of threshold energy and kinetic energy.

$\begin{matrix} h v & = & h v_{0} + \frac{1}{2} m_{e} v^{2} \\ v^{2} & = & \frac{2 h (v - v_{0})}{m_{e}} \\ v & = & \sqrt{\frac{2 h (v - v_{0})}{m_{e}}} \end{matrix}$

Which of the following equations represents the velocity ( v ) of the ejected electrons when a metal is made…

Solution