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Two thin lenses of powers 5D and 2D are placed coaxilly at a distance 20 cm apart. Find the

+3 votes

asked Mar 30, 2019 in Class 12 by kratos

Two thin lenses of powers 5D and 2D are placed coaxilly at a distance 20 cm apart. Find the focal length and power of the combination of lenses.

light – reflection and refraction
cbse
optical instruments
class-10
ray optics
class-12

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1 Answer

+3 votes

answered Mar 6, 2020 by kratos

Best answer

P1 = 5D2 P2 = 2D, d = 20 cm

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