An astronomical telescope with an objective lens of focal length +80 is focused on the...
An astronomical telescope with an objective lens of focal length +80 is focused on the...
An astronomical telescope with an objective lens of focal length +80 is focused on the moon .By how much must the eyepiece be moved to focus the telescope on an object 40 meter distant.?
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Asked by Sheik on 3rd April, 2021
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