A lens of diameter 5 0 cm and focal length f 20 0 cm was...
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A lens of diameter 5 0 cm and focal length f 20 0 cm was cut along the diameter into two identical halves In the process a thin layer of lens a 1 0 mm is lost Then the halves were put together to form a composite lens A source slit is placed 10 cm from the lens emitting light of wavelength 600 nm Behind the lens a screen wall located at a distance b 80 cm from lens Find the fringe width B 0 3 mm A 0 15 mm D 1 2 m C 0 6 mm
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