Physics

Problem

The threshold frequency for a certain metal is

4.5\times10^{14}\,\text{Hz}

. Light of frequencies

6.0\times10^{14}\,\text{Hz}

and

9.0\times10^{14}\,\text{Hz}

are separately incident on the metal. What is the ratio of the maximum kinetic energies of the electrons emitted by these two radiations (

K_{\text{max,1}}:K_{\text{max,2}}

)? a)

2:3

3:1

1:3

1:2