Suppose I have two different visible lights of different wavelengths passing through in a two-slit interference experiment. What appears on the screen is mostly a mixture of the two colours. However, one of the bright fringes, say m=2 is purely 1 of the colours (this light has say, 300 micrometers in wavelength), and none of the other.
What are the possible wavelengths of the second visible light?
y = (R)(m)(lambda)/(d)
dsin(theta) = m(lambda)
The Attempt at a Solution
How do I figure this out? If none of the second colour appeared, it would mean that somehow there was interference and therefore only the first colour showed? How would I find the wavelengths of the second colour though.
Sorry I can't really give a better attempt or answer, I'm just so lost on this that it's discouraging. Thanks for your help/explanations in advance.