A lens of focal length f 40 cm is cut along the diameter into two...
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A lens of focal length f 40 cm is cut along the diameter into two equal halves In this process a layer of thickness 1mm is lost then halves are put together to form a composite lens In between focal plane and the composite lens a narrow slit is placed very close to the focal plane f The slit is emitting monochromatic light of wavelength 0 6um Behind the lens a screen is located at a distance L 0 5m from it as shown A B C Fringe width is 0 12 mm Fringe width is 0 24 mm Length of interference pattern is 1 8 cm S f 40cm Tu 0 5m
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