Question: Plane waves of green light ( = 546.1 nm) impinge normally on a long narrow slit (0.15 mm wide) in an opaque screen. A large

Plane waves of green light (λ = 546.1 nm) impinge normally on a long narrow slit (0.15 mm wide) in an opaque screen. A large lens with a focal length of +62.0 cm placed just behind the slit produces a Fraunhofer diffraction pattern on a screen at its focal plane. Determine the width of the central irradiance maximum (zero to zero).

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