Question

What is the frequency of a photon that has the energy of 8.46x10^-19 J?

Answer 1

The frequency of the photon is 1.28 PHz.

E = hf

f = E/h = 8.46 × 10⁻¹⁹ J/6.626 × 10⁻³⁴ J·s = 1.28 × 10¹⁵ s⁻¹ = 1.28 PHz