The threshold frequency for dislodging an electron from a zinc metal surface is 8.54 x 1014 Hz. Calculate the minimum amount of energy required to remove an electron from the metal.

Explanation:

frequency of radiation

= 8.54 x 10¹⁴

wave length =  3 x 10⁸ / 8.54 x 10¹⁴

= .3513 x 10⁻⁶ m

= 3513 A

Energy of this wave OR energy of each photon  in eV

= 12375 / 3513

= 3.52 eV

the minimum amount of energy required = 3.52 eV.