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# According to Einstein’s photoelectric equation, the plot of the KE of the emitted photoelectrons from a metal vs the frequency of the incident radiation gives a straight line whose slope

$\begin{array}{1 1} \text{(a) depends on the nature of the metal used} \\ \text{(b) depends on the intensity of the radiation} \\ \text{(c) both A & B} \\ \text{ (d) Depends on neither A nor B} \end{array}$

Ans : (d)
Einstein’s photoelectric equation is $KE_{max} = hc \: – \phi$……..(i)
The equation of the line is $y=mx+C$………..(ii)
comparing eqns. (i) & (ii),
$m = h, c = -\phi$
So, slope is a constant and independent of intensity of radiation
edited Mar 26, 2014