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A student focuses the image of a candle flame on a white screen by placing the flame at various distance from the convex lens. He noted the observations as follows:(Answer any four questions from 1 to 5)Distance of flame from the lens: 1.60cm2.40cm3.30cm4.24cm5.12cmDistance of screen from the lens:1.20cm2.24cm3.30cm4.40cm5.70cm1) In which case is the size of image equal to the size of objectA) 1B) 2C) 4D) 32) In which case observation is wrong?A) 4B) 5C) 2D) 33) The magnification of the image in case 2 is:A) -0.6B) +0.6C) -1/6 D) +1/64) The power of the lens is:A) -20/3 DB) +1/15DC) +20/3DD) -1/15D5) The real inverted and enlarged image is formed in case of:A) 1B) 4C) 3D) 2 |
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Answer» tgffgdvdxnbxhxhgfhdhdhf |
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