Figure shows a plot of stopping potential (V0) with frequency (v) of incident radiation

Question 1

Figure shows a plot of stopping potential (V0) with frequency (v) of incident radiation for two photosensitive materials M1 and M2. Explain

(i) Why the slope of both the lines is same ?

(ii) For which material emitted electrons have greater kinetic energy for the same frequency of incident radiation ?

Question 2

(i) Slope of the graph between V0 and v (from Einstein * equation) equals (h/e). Hence it does not depend on the nature of the material.

(ii) Emitted electrons have greater energy for material M1. This is because ϕ0 (= hvo) has a lower value for material M1.

kratos · Answer 1 · 2020-06-27T23:53:13+0000

(i) Slope of the graph between V0 and v (from Einstein * equation) equals (h/e). Hence it does not depend on the nature of the material.

(ii) Emitted electrons have greater energy for material M1. This is because ϕ0 (= hvo) has a lower value for material M1.

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