Physics Electron, Photon, Photoelectric Effect and X-rays Karnataka - CET Previous Year Question MCQ (Single Correct)

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

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.

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The correct answer is:
C

According to Einstein's photoelectric equation

where, Planck's constant

Frequency of incident light

Work function of a metal

Compare it with the equation of straight line

we get, slope of the graph

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