The threshold wavelength for photoelectric emission in tungsten is 2300 Å. What wavelength of light must be used to eject electrons with a maximum energy of 1.5 eV?

If I_(0) is the threshold wavelength for photoelectric emission, 1 the wavelength of light falling on the surface of a metal and m is the mass of the electron, then the velocity of ejected electron is given by

Threshold wavelength for lithium metal is 6250 Å. For photo emission, the wavelength of the incidennt light must be

Threshold wavelength for lithium metal is 6250 Å. For photo emission, the wavelength of the incidennt light must be

The threshold wavelength for tungsten is 2730 Å . The work function of tungsten is

For photoelectric emission , tungsten requires light of 2300 Å . If light of 1800 Å wavelength is incident then emission

The threshold wavelength of tungsten is 2300 Å. If ultra voilet light of wavelength 1800 Å is incident on it, then the maximum kinetic energy of photoelectrons would be