An observer looks at a distance tree of height 10 m with a telescope of magnifying power of 20. To the observer the trees appears
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An observer looks at a distance tree of height 10 m with a telescope of magnifying power of 20. To the observer the trees appears An observer looks at a distance tree of height 10 m with a telescope of magnifying power of 20. To the observer the trees appears October 9, 2020 Category: Uncategorised [...]