How many dark fringes will be produced on either side of the central maximum if light (λλ = 636 nm) is incident on a single slit that is 4.87 × 10-6 m wide?

How many dark fringes will be produced on either side of the central maximum if light (λλ = 699 nm) is incident on a single slit that is 4.84 × 10-6 m wide?

(a) How many fringes appear between the first diffraction-envelope minima to either side of the central maximum in a double-slit pattern if λ = 691 nm, d = 0.120 mm, and a = 39.4 μm? (b) What is the ratio of the intensity of the third bright fringe to the intensity of the central fringe? (a) Number i 3 Units No units (b) Number 2.0E-4 Units No units

A diffraction pattern is produced on a screen 1.40 m from a single slit, using monochromatic light of wavelength 5.00 x 102 nm. The distance from the center of the central maximum to the first - order maximum is 3.00  mm. Calculate the slit width. Hint: Assume that the first - order maximum is halfway between the first - and second - order minima.