Ex. 10 : In Young's experiment interference bands are produced on the screen placed at 1.5 m, from the two slits 0.15 mm apart and illuminated by a light of wavelength 6500 A. find (1) the fringe width and (2) the change in the fringe width if the screen is taken away from the slit by 50 cm.
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Q: Explain the factors that affect projectile movements, such as shot-put throwing or a long-jump.
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