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A telescope objective of focal length Im...

A telescope objective of focal length Im forms a real image of the moon 0.92cm in diameter. Calculate the diameter of the moon taking its mean distance from the earth to be `38xx10^(4)`km If the telescope uses an eyepiece of 5cm focal length, what would be the distance between the two lenses for (i) the final image to be formed at infinity (ii) the final image(virtual) at 25 cm form eye.

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