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(D) Einstein's photoelectric equation is given by: $K_{\max} = hf - \phi$,where $K_{\max}$ is the maximum kinetic energy,$h$ is Planck's constant,$f$

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Is the same for all metals and is independent of the intensity of radiation.

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(D) Einstein's photoelectric equation is given by: $K_{\max} = hf - \phi$,where $K_{\max}$ is the maximum kinetic energy,$h$ is Planck's constant,$f$ is the frequency,and $\phi$ is the work function.Comparing this with the equation of a straight line $y = mx + c$,where $y = K_{\max}$ and $x = f$,we get the slope $m = h$.Since $h$ (Planck's constant) is a universal constant,the slope of the graph is the same for all metals and is independent of the intensity of the incident radiation.

According to Einstein's photoelectric equation,the graph of the kinetic energy of photoelectrons emitted from a metal versus the frequency of incident radiation is a straight line whose slope:

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