Photoelectric Experiment: Intensity, Stopping Potential & Graphs
Given below are two statements:
Statement I: Figure shows the variation of stopping potential with frequency for the two photosensitive materials and . The slope gives value of , where is Planck's constant, e is the charge of electron.
Statement II: will emit photoelectrons of greater kinetic energy for the incident radiation having same frequency.
In the light of the above statements, choose the most appropriate answer from the options given below.
Show answer and solution
Answer: (a)
- , so the slope of each line is : Statement I is correct.
- has the higher threshold frequency, so larger work function .
- For the same , is smaller for : Statement II is incorrect.
- So the answer is (a).