Chapter 7, Problem 65E

Interpretation Introduction

Interpretation:

The velocity of an electron emitted by a metal having threshold frequency equals to $2.25\times {10}^{14}{\text{s}}^{-1}$ is to be calculated.

Concept introduction: According to Einstein light energy comes in packets. These packets are called photons. He states that the amount of energy in the form of photons depends upon the frequency of the photon. The expression for the same is,
$E=h\upsilon$

The value of Planck’s constant $\left(h\right)$ is $6.626\times {10}^{-34}\text{J}$ .

To determine: The velocity of an electron emitted by a metal having threshold frequency equals to $2.25\times {10}^{14}{\text{s}}^{-1}$ .