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 :

Question

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 : (A) 10 times taller. (B) 10 times nearer. (C) 20 times taller. (D) 20 times nearer.

Tardigrade Admin · Accepted Answer

Magnification of a telescope is given by: M =(θ i /θ o ) 20=( h / d i / h / d o ) 20=( d 0/ d i ) Distance of image, d i =( d o /20)

Q. 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 :

10 times taller.

10 times nearer.

20 times taller.

20 times nearer.

Magnification of a telescope is given by:
$M = \frac{θ _{i}}{θ _{o}}$
$20 = \frac{h / d _{i}}{h / d _{o}}$
$20 = \frac{d _{0}}{d _{i}}$
Distance of image, $d_{i} = \frac{d _{o}}{20}$

Q. An observer looks at a distant tree of height 10m with a telescope of magnifying power of 20. To the observer the tree appears :