(a) How many bright fringes appear between the first diffraction-envelope minima to either side of the central maximum in a double-slit pattern if lambda 550 nm, d = 0.180 mm, and a = 30.0 mu m? (b) What is the ratio of the intensity of the third bright fringe to the intensity of the central fringe?

(a) How many bright fringes appear between the first diffraction-en

1.	(a) How many bright fringes appear between the first diffraction-envelope minima to either side of the central maximum in a double-slit pattern if lambda 550 nm, d = 0.180 mm, and a = 30.0 mu m? (b) What is the ratio of the intensity of the third bright fringe to the intensity of the central fringe?
Answer» SOLUTION :(a) 11, (B) 0.405

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