An excited ion emits radiation at a wavelength of 654.1 nm in the visible range of the spectrum. Calculate the

Question

An excited ion emits radiation at a wavelength of 654.1 nm in the visible range of the spectrum. Calculate the frequency of a photon of this radiation (in hertz).

Answer 1

Convert nm to meters ---> 654.1 nm = 654.1 x 10^-9 m

Frequency = speed of light / wavelength
= 3 x 10^8/654.1x10^-9 = 4.586x10^14 Hz