Appeared in: 2025 (3 sets)
The frequency of a photon of energy $1\cdot326\text{ eV}$ is :
(A) $1\cdot18 \times 10^{14}\text{ Hz}$
(B) $3\cdot20 \times 10^{14}\text{ Hz}$
(C) $4\cdot20 \times 10^{15}\text{ Hz}$
(D) $4\cdot80 \times 10^{15}\text{ Hz}$