A point object is located at a distance of 100 m from a screen A...

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A point object is located at a distance of 100 m from a screen A lens of focal length 23 cm mounted on a movable frictionless stand is kept between the source and the screen The stand is attached to a spring of natural length 50 cm and spring constant 800 N m as shown Mass of the stand with lens is 2 kg How much impulse P should be imparted to the stand so that a real image of the ob is formed on the screen after a fixed time gap Also find this time gap Neglect widt the stand P ooooooo 50 cm 100 cm Stre

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