Question

two thin lenses of power +10D and -2D are placed in contact. The focal legnth of the combination is

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Answer 1

Answer:

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Answer 2

Answer:

Two thin lenses when placed in contact, then the power of combination is +10D. If they are kept 0.25 m apart, then the power reduces to +6D. The focal lengths of the lenses (in m) will be. 0.5 and 0.125

Step-by-step explanation:

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