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Chemistry, 16.12.2019 21:31 cia196785920

A4-inch, f/5 telescope has a 1-inch eyepiece focal. its magnifying power is: 4x 5x 9x 20x

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A4-inch, f/5 telescope has a 1-inch eyepiece focal. its magnifying power is: 4x 5x 9x 20x...
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