The separation between the slits for red light.

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Chapter 35, Problem 43PQ

To determine

The separation between the slits for red light.

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In a Young’s Double Slit Experiment the distance between two slits is 0.150 mm and the length from the double slit to the screen is 120 cm. The distance from central fringe to the nth fringe is 2 cm. The wavelength of the light is 750 nm. What is the path difference for the rays from the two slits arriving at a point on the screen, say point P?

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