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A convex lens of focal length 20 cm is placed in contact with a concave lens of focal length 40 cm. Calculate the : (a) Power of each lens (b) Power of resulted lens (c) Nature of resulted lens (d) Focal length of the resulted lens [5 MARKS] |
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Answer» A convex lens of focal length 20 cm is placed in contact with a concave lens of focal length 40 cm. Calculate the : (a) Power of each lens (b) Power of resulted lens (c) Nature of resulted lens (d) Focal length of the resulted lens [5 MARKS] |
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