Q. According to Einstein's photoelectric equation, the plot of the kinetic energy of the emitted photoelectrons from a metal the frequency, of the incident radiation gives a straight line whose slope

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Solution:

Einstein's photoelectric equation is
...(i)

Solution
The equation of line is
...(ii)
Comparing above two equations

Hence, slope of graph is equal to Planck's constant (non-variable) and does not depend on intensity of radiation.