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

Answer 1

The green light will have a longer wavelength. This is because wavelength and frequency are inversely related. This can be seen by the fact that c = λν

c = speed of light = constant (3x108 m/sec)

λ = wavelength

ν = frequency

So, if wavelength increases, frequency must decrease and vice versa.