When the light of frequency 2 v_0 (where v_0 is threshold frequency), is incident on a metal plate, the maximum velocity of electrons emitted is v_1.…

When the light of frequency $\displaystyle 2 \mathrm{v}_0$ (where $\displaystyle \mathrm{v}_0$ is threshold frequency), is incident on a metal plate, the maximum velocity of electrons emitted is $\displaystyle \mathrm{v}_1$. When the frequency of the incident radiation is increased to $\displaystyle 5 \mathrm{v}_0$, the maximum velocity of electrons emitted from the same plate is $\displaystyle \mathrm{v}_2$. The ratio of $\displaystyle \mathrm{v}_1$ to $\displaystyle \mathrm{v}_2$ is