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 :
← JEE Main 2016 · 3 Apr · Shift 1
PhysicsSingle correct+4 / -1Question 19 of 90
JEE Main 2016 · 3 Apr · Shift 1, Physics question 19
Answer and worked solution
Official answer: D
A telescope magnifies the angle the tree subtends 20 times; the image looks as the tree would from 20 times closer. Its height is unchanged, so it appears 20 times nearer.
Topics:Optical instruments