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 slop 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 fro all metals and independent of the intensity of the incident radiation.
• D. Depended on the nature of the metal

Answer 1

Answer: (C)

Is same fro all metals and independent of the intensity of the incident radiation.

Answer 2

: According to Einstein’s photoelectric equation

Maximum kinetic energy

Where (tgkˇ)

h = Planck’s constant

= Frequency of incident light

$\phi _ { 0 }$ = work function of a metal

Compare it with the equation of straight line

$y = m x + c$

We get, slope of the graph = h