Question

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

• A. depends on the intensity ofthe incident radiation
• B. depends on the nature of the metal and also on the intensity of incident radiation
• C. is same for all metals and independent of the intensity of the incident radiation
• D. depends on the nature of the metal

Answer 1

Answer: (C)

According to Einsteins photoelectric equation Maximum kinetic energy, $K_{max}=h\upsilon - \phi_{0}$
where, $h$ = Planck’s constant
$\upsilon$= Frequency of incident light
$\phi_{0}$= Work function of a metal
Compare it with the equation of straight line
$y=mx+c$
we get, slope of the graph = $h$