Young's interference experiment is performed with monochromatic light. The separation between the slits is 0.500 mm, and the interference pattern on a screen 3.30 m away shows the first side maximum 3.40 mm form the center of the pattern. What is the wavelength ?

Explanation

`y_("bright") = (lambda L)/(d) m`
For `m = 1, lambda = (lambda d)/(L) = ((3.40 xx 10^(-3) m) (5.00 xx 10^(-4) m))/(3.30 m)`
`= 515 nm`