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In a Young's Double slit experiment the wavelength of the monochromatic
light used is 632 nm. If the slit separation is 0.02 mm and the distance
between the double slits and the screen is 1.2 m, calculate
(i)
(ii)
The distance of the fourth dark fringe from the centre of the
interference pattern.
The distance of the third bright fringe from the centre of the
interference pattern.

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