How many fringes appear between the first diffraction-envelope minima to either side of the central maximum in a double-slit pattern if ? = 692 nm, d = 0.221 mm, and a = 39.3 µm? (b) What is the ratio of the intensity of the third bright fringe to the intensity of the central fringe?

How many fringes appear between the first diffraction-envelope minima to either side of the central maximum in a double-slit pattern if ? = 692 nm, d = 0.221 mm, and a = 39.3 µm? (b) What is the ratio of the intensity of the third bright fringe to the intensity of the central fringe?

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter35: Diffraction And Interference

Section: Chapter Questions

Problem 60PQ

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Concept explainers

Diffraction of light

In physics, the term diffraction is defined as the bending of light around the corners of the obstacle. As a light ray passes by an aperture, it bends around the edges or through slits, it spreads out through a narrow opening. The diffracted light will produce fringes of bright and dark or colored bands which are labeled as a diffraction pattern.

Question

(a) How many fringes appear between the first diffraction-envelope minima to either side of the central maximum in a double-slit pattern if ? = 692 nm, d = 0.221 mm, and a = 39.3 µm? (b) What is the ratio of the intensity of the third bright fringe to the intensity of the central fringe?

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Step 2: a) Find the number of fringes appear between the first diffraction-envelope:

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Step 3: b) The ratio of the intensity of the third bright fringe to the intensity of the central fringe:

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