Question

What is the frequency of light that has an energy of 1.8 x 10-15 J? 6.626 x 10-34 Js 2.7 x 1018 Hz 3.7 x 10-19 Hz 1.2 x 10-48 Hz

Answer 1

In order to determine the frequency, we may use Planck's equation:

Energy = Planck's constant * frequency

Rearranging and substituting the values,

frequency = (1.8 x 10⁻¹⁵) / (6.63 x 10⁻³⁴)
f = 2.71 x 10¹⁸ Hz

The frequency of the light is 2.7 x 10¹⁸ Hz