a convex lens of focal length 18 cm and a concave lens of 24 cm are placed in contact such that they have a common principle axis. will the combination act as a convex lens. find the focal length and power of combination
a convex lens of focal length 18 cm and a concave lens of 24 cm are placed in contact such that they have a common principle axis. will the combination act as a convex lens. find the focal length and power of combination
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Answer:
1/v-1/u=1/f
Explanation:
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