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How can Newton rings experiment be used to determine refractive index of liquid?
The experimental arrangement for Newton's rings set up is made with the plane convex lens placed on the optically plane glass plate. The diameter of nth and mth dark ring (say 5th and 15th ring ) is measured using vernier microscope. Let it be Dn and Dm.
Echo: The sound heard after reflection from an obstacle is known as echo.
Experiencing a constant horizontal 1.10 m/s wind, a hot-air balloon ascends from the launch site at a constant vertical speed of 2.70 m/s. At a height of 202 m, the balloonist main
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