Question

Write Einstein's photoelectric equation. How did Millikan prove the validity of this equation ?

How does Einstein's photoelectric equation explain the emission of electrons from a metal surface ? Explain briefly. Plot the variation of photocurrent with : (a) collector plate potential for different intensity of incident radiation, and (b) intensity of incident radiation.

Light of frequency 6·4 × 10¹⁴ Hz is incident on a metal of work function 2·14 eV. The maximum kinetic energy of the emitted electrons is about :

Figure shows the variation of photoelectric current measured in a photo cell circuit as a function of the potential difference between the plates of the photo cell when light beams A, B, C and D of different wavelengths are incident on the photo cell. Examine the given figure and answer the following questions: