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The graph between 1 //lambda and stoppin...

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 shwon in the figure. Which of the following statement (s) is `//` are correct ? [Here `lambda` is the wavelength of incident ray ].

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 Planck's 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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The correct Answer is:
A,C
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