Question

The work function of a photoelectric material is 3.3 eV. Its threshold frequency will be

Answer 1

work function= planksconstant x threshold frequency

by substituting the given value we get the answer that

Threshold frequency= 4.98x10 power 33

Answer 2

Answer: The threshold frequency of the material comes out to be $7.97\times 10^{14}s^{-1}$

Explanation:

Work function for a material is defined as the minimum amount of energy required to remove an electron to infinity from the surface of the material.

Mathematically,

$W=h\nu_o$

where,

W = work function of the material = $3.3eV=3.3\times 1.602\times 10^{-19}J$     (Conversion factor: $1eV=1.602\times 10^{-19}J$ )

h = Planck's constant = $6.626\times 10^{-34}Js$

$\nu_o$ = Threshold frequency of the material

Putting values in above equation, we get:

$3.3\times 1.602\times 10^{-19}J=6.626\times 10^{-34}Js\times \nu_o\\\\\nu_o=7.97\times 10^{14}s^{-1}$

Hence, the threshold frequency of the material comes out to be $7.97\times 10^{14}s^{-1}$