The figure shows a plot of three curves a, b, c showing the variation of photocurrent vs. Collector plate potential for three different intensities I₁, I₂, and I₃ having frequencies v₁, v₂ and v₃ respective incident on a photosensitive surface.
The figure shows a plot of three curves a, b, c showing the variation of photocurrent vs. Collector plate potential for three different intensities I₁, I₂, and I₃ having frequencies v₁,v_2, and v₃ respective incident on a photosensitive surface.

The frequency V of incident radiation is greater than threshold frequency (v_o) in a photocell. How will the stopping potential vary if frequency (v) is increased, keeping other factors constant?

Two metals A and B have work functions 4eV and 10eV respectively. Which metal has the higher threshold wavelength?

de Broglie wavelength associated with an electron accelerated through a potential difference V is \(\lambda\). What will be the de Broglie wavelength when the accelerating potential is increased to 4 V?

Red light however bright it is, cannot produce the emission of electrons from a clean zinc surface, but even weak ultraviolet radiation can do so; why?