The maximum K.E. of photoelectrons ejected from a photometer when it is irradiated with radiation of a wavelength 400nm is 1eV. If the threshold energy of the suface is 1.9 eV,

The maximum kinetic energy of the photoelectrons ejected from a photocathode when it is irradiated with light of wavelength 440nm is 1eV. If the threshold energy of the surface is 1.9eV, then which of the following statement is/are incorrect?

The maximum kinetic energy of photoelectrons ejected from a metal, when it is irradiated with radiation of frequency 2xx10^(14)s^(-1) is 6.63xx10^(-20) J. the threshold frequency of the metal is:

The photoelectric threshold for some material is 200 nm. The material is irradiated with radiations of wavelength 40 nm. The maximum kinetic energy of the emitted photoelectrons is

The photoelectric threshold for some material is 200 nm. The material is irradiated with radiations of wavelength 40 nm. The maximum kinetic energy of the emitted photoelectrons is

Work function of a metal surface is 2eV. Maximum kinetic energy of photoelectrons emitted from the surface for incidence of light of wavelength 4140 Å is 1eV. What is the threshold wavelength of radiation for that surface?

When radiation of wavelength 3000 Å is incident on a photosensitive surface, the maximum K.E. of the photoelectrons is 2.5 eV. What is the stopping potential if radiation of wavelength 1500 Å is incident on the same surface ?

The work function of a metal is 4.0 eV . If the metal is irradiated with radiation of wavelength 200 nm, then the maximum kinetic energy of the photoelectrons would be about.

The threshold wavelength of a metal is 230 nm . The maximum K.E. of the electrons ejected from the metal surface by the radiation of wavelength 180 nanometer is