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Consider an observer at a point O, at a distance of 100 cm from a convex lens of focal length 50 cm. A plane mirror is placed behind the lens at a distance of 150 cm from the lens. The mirror now starts moving towards the right with a velocity of 10 cms−1. What will be the magnitude of velocity (in ms−1) of his own image as seen by observer, at the moment when the mirror just starts moving? (Answer upto two digits after the decimal point.) |
Answer» Consider an observer at a point O, at a distance of 100 cm from a convex lens of focal length 50 cm. A plane mirror is placed behind the lens at a distance of 150 cm from the lens. The mirror now starts moving towards the right with a velocity of 10 cms−1. What will be the magnitude of velocity (in ms−1) of his own image as seen by observer, at the moment when the mirror just starts moving? (Answer upto two digits after the decimal point.) |
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