The intercept of the y-axis for the graph between stopping potential versus frequency will give us:
Question
The intercept of the y-axis for the graph between stopping potential versus frequency will give us:
A.
maximum kinetic energy of the emitted electron
B.
stopping potential of the metal
C.
work function of the metal in natural units
D.
maximum potential energy of the emitted electron
Correct option is C
In the photoelectric effect, the graph of stopping potential Vs versus frequency ν gives a straight line with the intercept on the y-axis representing the work function of the metal.This relationship is given by the Einstein photoelectric equation:eVs=hν−ϕWhere:eVs is the kinetic energy of the emitted electron (i.e., the stopping potential),hν is the energy of the incident photons,ϕ is the work function of the metal.Thus, the intercept on the y-axis of the Vs vs. ν graph corresponds to the work function of the metal.