Threshold frequencies of the metals \(A\) and \(B\) are respectively
\[
4\times10^{14}\ \text{Hz}
\]
and
\[
6\times10^{14}\ \text{Hz}.
\]
If both are irradiated with light of frequency
\[
10^{15}\ \text{Hz},
\]
what is the ratio of the kinetic energies of electrons emitted from \(A\) and \(B\)?
Show Hint
For photoelectric emission,
\[
K_{\max}=h(\nu-\nu_0).
\]
For the same incident frequency, the metal with the lower threshold frequency emits photoelectrons with greater kinetic energy.