JEE MAIN - Physics (2016 (Offline) - No. 4)
An observer looks at a distant tree of height $$10$$ $$m$$ with a telescope of magnifying power of $$20.$$ To the observer the tree appears:
$$20$$ times taller
$$20$$ times nearer
$$10$$ times taller
$$10$$ times nearer
Giải thích
A telescope magnifies by making the object appearing closer.