Physics - Modern Physics Question with Solution | TestHub

A beam of light of wavelength $\lambda$ falls on a metal having work function $\varphi$ placed in a magnetic field $B$. The most energetic electrons, perpendicular to the field are bent in circular arcs of radius R. If the experiment is performed for different values of $\lambda$, then $B^2$ vs. $\frac{1}{\lambda }$ graph will look like (keeping all other quantities constant)