Explain the Variation of stopping potential With frequency of incident radiation, graphically. Also discuss the reason behind constant slope and different Y-intercept for different material.
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Explanation:
Due to the increase in frequency, there is an increase in kinetic energy of the electron.
So, the stopping potential increases with increase in the frequency of incident radiation in relation to the photoelectric effect.
(b)
Point p on the graph shows the threshold frequency.
Hence, the threshold frequency
is the intercept along
(frequency) axis.
Now, the slope of the given graphs gives
Hence, plank's constant
slope of the graph
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