Question

studying for my final, help

velengths of light, all able to eject photoelectrons, shine ond is independent of the intensity of the 1) (1 pt] In an experiment different wavelengths of light, all able to eject pm on a freshly on a freshly prepared (oxide-free) zinc surface. Which statement is truer a. The number of photoelectrons emitted per second is independent of me light for all the different wavelengths b. The number of photoelectrons emitted per second is directly proportional to use er second is directly proportional to the frequency for all the different wavelengths. C. The maximum kinetic energy of the photoelectrons emitted is directly proportional to the frequency for each wavelength present. d. The maximum kinetic energy of the photoelectrons has linear relationship with the frequency for each wavelength present. e. The maximum kinetic energy of the photoelectrons is proportional to the intensity of the light and independent of the frequency.

Answer 1

Option (D) The maximum kinetic energy of photoelectrons has linear relationship with the frequency for each wavelength present.

when the light of the sufficient frequency incident on surface of metal there is an ejection of electrons . This phenomenon is photoelectric effect. The maximum kinetic energy of ejected electrons is related with frequency of incident light as

$K_{max}= h\nu- \phi$ Where phi ($\phi$)is called the work function of metal. If you increase the intensity of incident light ( number of photons per unit area per unit time increases) large no. Of electrons interact with photons. So no of ejected electrons called photoelectrons will be more.  

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