Chapter 7, Problem 7A.2ST

Interpretation Introduction

Interpretation:

The electrons speed ejected at wavelength of $\text{265}\text{nm}$ has to be calculated.

Concept Introduction:

Work function: Work function of a metal is measure of strength of electrons is held in a metal atom.

$\text{hν}\text{=}\text{KE}\text{+}\varphi \boxed{\begin{array}{c}here,\varphi =\text{ work function}\\ \text{KE }=\text{ kinetic energy}\\ \text{h = Planck’s constant} \\ \text{ν}=\text{ frequency}\end{array}}$

Energy can be in the form of kinetic energy or potential energy.  Kinetic energy is the energy associated with motion.

${\text{E}}_{\text{k}}\text{=}\frac{\text{1}}{\text{2}}{\text{mv}}^{\text{2}}\boxed{\begin{array}{l}here,\text{m - Mass in kilograms}\hfill \\ \text{v - Velocity in meters per second}\hfill \end{array}}$