When light of sufficiently high frequency is incident on a metallic surface, electrons are emitted from the metallic surface. This phenomenon is called photoelectric emission. Kinetic energy of the emitted photoelectrons depends on the wavelength of incident light and is independent of the intensity of light. Number of emitted photoelectrons depends on intensity. `(hv-phi)` is the maximum kinetic energy of emitted photoelectron (where `phi` is the work function of metallic surface). Reverse effect of photo emission produces X-ray. X-ray is not deflected by electric and magnetic fields. Wavelength of a continuous X-ray depends on potential difference across the tuve. Wavelength of charasteristic X-ray depends on the atomic number.
Q. A monochromatic light is used in a photoelectric experiment on photoelectric effect. The stopping potential

Options

A. is related to the mean wavelength
B. is related to the shortest wavelength
C. is related to the maximum kinetic energy of emitted photoelectrons
D. intensity of incident light

Answer

B, C

Explanation

Stopping potential is the measurement of maximum kinetic energy of emitted protoelectrons and kinetic energy of emitted photoelectrons is linearly related with the frequency of incident light corresponding (i.e., sorresponding to shortest wavelength, KE is maximum). Stopping potential is independent of intensity. From above explanation, it is clear that choices (a) and (d) are