First slide
Photoelectric effect and study of photoelectric effect
Question

The graph between 1λand stopping potential (V) of three metals having work functions ϕ1,ϕ2 and ϕ3 in an experiment of photo-electric effect is plotted as shown in the figure. Which of the following statement(s) is/are correct? [Here λ is the wavelength of the incident ray].

Moderate
Solution

eV=hcλϕV=hcϕe=hce1λϕe  Slope =tanθ=hceϕ=hcλϕ1:ϕ2:ϕ3=1λ1:1λ2:1λ3=1:2:4

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