Q 2381591427.     The graph between `1/\lambda` and stopping potential `(V)` of three metals having work functions `\phi _{1}, \phi _{2}` and `\phi _{3}` in an experiment of photoelectric effect is plotted as shown in the figure. Which of the following statement(s) is/are correct ?
[Here `\lambda` is the wavelength of the incident ray].

(This question may have multiple correct answers)

A Ratio of work functions `\phi _{1} : \phi _{2} : \phi _{3}=1 : 2 : 4.`
B Ratio of work functions `\phi _{1} : \phi _{2} : \phi _{3}=4 : 2 : 1.`
C `tan \theta `is directly proportional to `hc//e`, where `h` is Plancks constant and c is the speed of light.
D The violet colour light can eject photoelectrons from metals 2 and 3.

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