Tell me about the formula and principle of obtaining the focal length and size of the...

Tell me about the formula and principle of obtaining the focal length and size of the Zoom lens with one convex lens and two concave lenses.

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genius_generous answered 3 years ago

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Two lenses, one converging with focal length 22.0 cmcm and one diverging with focal length −−...

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Tell me about the formula and principle of obtaining the focal length and size of the...

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