Green light has a lower frequency than blue light. Which color of light has a longer wavelength?

1 Answer
David G.
May 1, 2016

The equation for electromagnetic radiation is #c=flambda# where #c# is the (constant) speed of light in a vacuum #(ms^-1)#, #f# is the frequency #(Hz=s^-1)# and #lambda# is the wavelength #(m)#. Since #c# is constant, if #f# gets smaller, #lambda# must get larger, so green light has the longer wavelength.

Related questions
See all questions in Calculations with wavelength and frequency
Impact of this question
6487 views around the world
You can reuse this answer
Creative Commons License