Electrons of wavelength 1.5 nm are emitted from a material when light of wavelength 350nm is incident on it. what is the work function of this material?

3.5434 eV

Explanation:

For a particle with kinetic energy E and mass m , the wavelength  associated is given by the following relation,

E =

Putting the values  we get

E =

=1.063 x 10⁻²¹ J

= .0066 eV.

Energy of¹light in terms of eV

= 1244 / 350 = 3.55 eV.

Work function = 3.55 - 0.0066 = 3.5434 eV.

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