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A student focused the image of a candle flame on whitescreen using a convex lens. He noted down the position of thecandle screen and the lens as underPosition of candle = 12.0 cmPosition of convex lens = 50.0 cmPosition of screen = 88.0 cma) What is the focal length of the convex lens?b) Where will the image be formed if he shifts the candletowards the lens at a position of 31 cm?c) Draw a ray diagram to show the formation of the imagein the case (b) as said above.3 Sec |
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Answer» Explanation: Before shifting the CANDLE, u=12−50=−38cm v=88−50=38cm f1=v1−u1 f1=381+381 f1=381+1 f=19 cm Hence, before shifting the candle, it is placed at a distance of 2F from the mirror. When candle is shifted towards the LENS from this POSITION, its distance from the lens is f |
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