Question

Which is the constructive interference formula for diffraction grating problems?

dsin =
dcos =
dcos = n
dsin = n

Answer 1

D. d times sin theta = n times lambda

Step-by-step explanation:

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Answer 2

The formula applied in diffraction gratings is:
dsin(θ) = nλ
where d is the distance between two adjacent openings in the grating, θ is the angle between two minima or maxima of light, n is the order of the maxima or minima formed and λ is the wavelength of the light being diffracted.