Question: A diffraction grating has resolving power R = avg/ = Nm. (a) Show that the corresponding frequency range f that can just be resolved is

A diffraction grating has resolving power R = λavg/Δλ = Nm.

(a) Show that the corresponding frequency range Δf that can just be resolved is given by Δf = c/Nmλ.

(b) From Figure show that the times required for light to travel along the ray at the bottom of the figure and the ray at the top differ by Δt = (Nd/c) sin θ.

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