CUET and UG exam WB JEE Mock Test Series 2025 Physics Dual Nature: Photon and Matter Waves The Photoelectric Effect
The graph between \(\dfrac{1}{\lambda}\) and stopping potential (V) of three metals having work functions \(\phi_{1}, \phi_{2}\) and \(\phi_{3}\) in an experiment of photo-electric effect is plotted as shown in the figure. Which of the following statement(s) \(\mathrm{i}\mathrm{s}/\mathrm{a}\mathrm{r}\mathrm{e}\) correct? [Here \(\lambda\) is the wavelength of the incident ray].
1
Ratio of work functions \(\phi_{1}\) : \(\phi_{2}\) : \(\phi_{3}\)=1\) : 2 : 4
2
Ratio of work functions \(\phi_{1}\) : \(\phi_{2}\) : \(\phi_{3}\)=4\) : 2 : 1
3
\(\tan\Theta\) is directly proportional to \(\dfrac{hc}{e}\), where \(h\) is Planck's constant and \(c\) is the speed of light.
4
The violet colour light can eject photoelectrons from metals 2 and 3.