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

Options

A. depends on the intensity of the 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

C

Explanation

According to Einstein.s photoelectric equation
`K.E_(max)=hv-phi_(0)`
where, h = Planck.s constant
v = 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