Question

A multiple-slit diffraction grating has a slit separation of 1.50 × 10−6 m. Find the wavelength of the monochromatic light that will have its second-order bright fringe diffracted through an angle of 44.0°. (1 nm = 10−9 m)

425 nm

521 nm

13 nm

347 nm

260 nm

Answer 1

we have,

dsinθ = n

where, d = 1.5x10-6 m, θ = 44^o, and n = 2

so, = 521 nm

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