An Electron Has Energy of 105 EV $1.5 \times 10 ^ { 15 }$

Multiple Choice

An electron has energy of 105 eV. The frequency associated with this electron is

A) $1.5 \times 10 ^ { 15 }$ Hz.
B) $2.5 \times 10 ^ { 16 }$ Hz.
C) $7.4 \times 10 ^ { 15 }$ Hz.
D) $6.6 \times 10 ^ { 16 }$ Hz.