The graph
1λ and stopping potential
(V) of three metals having work function
ϕ1,
ϕ2 and
ϕ3 in an experiment of photoelectric effect is plotted as shown in the figure. Which one of the following statement is/are correct? [Here
λ is the wavelength of the incident ray]
(i) Ratio of work functions
ϕ1:ϕ2:ϕ3=1:2:4(ii) Ratio of work functions
ϕ1:ϕ2:ϕ3=4:2:1(iii)
tanθ∝hce, where
h= Planck's constant,
c= speed of light
(iv) The violet colour-light can eject photoelectrons from metals 2 and 3.