Question

Light of wavelength λ is incident on a single slit of width W= 8.5 μm. On a screen placed a distance behind the slit the first dark fringe is located at a distance of D 0.032 m from the central bright fringe. 0.46 m

Part (a) Find the expression for the wavelength, λ, incident on the slit.

Part (b) Calculate the value of λ, in nanometers