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

Options

A. 10 times taller
B. 10 times nearer
C. 20 times taller
D. 20 times nearer

Answer

C

Explanation

`m=20, m=(f_(0))/(f_(e))`
`h_(1)=10m, h_(2)=?`
`m=(h_(2))/(h_(1))=(h_(2))/(10)`
`20=(h_(2))/(10)`
`h_(2)=20xx10m=200m`
Image is 20 times enlarged through the telescope.