COMEDK2025PhysicsDual Nature of MatterActual
A plot of kinetic energy of emitted photoelectrons from a metal versus the frequency of incident radiation gives a straight line, the intercept of which A. Depends on the nature of the metal used B. Depends on the intensity of radiation C. Depends both on the intensity and the nature of metal used D. Is a constant and is same for all metals which is independent of the intensity of Incident radiation
Options
- AB
- BD
- CA
- DC
Correct answer
C. A
Step-by-step solution
According to Einstein's photoelectric equation, the kinetic energy K_ max of emitted photoelectrons is given by K_ max = h - , where h is Planck's constant, is the frequency of incident radiation, and is the work function of the metal. The equation K_ max = h - represents a straight line of the form y = mx + c , where y = K_ max , x = , m = h (slope), and c = - (intercept). The intercept on the y -axis is - , which is the negative of the work function of the metal. Since the work function is a characteristic proper