Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Ray Optics

Question:

Options:

a

b

c

d

Correct Answer:

c

Explanation:

Magnification of astronomical telescope for relaxed eye is m = $\frac{f_0}{f_e}$

$f_0= 100cm$

m = 20 

$\Rightarrow f_e = 5 cm$

Length of the telescope L = $f_0+f_e$= 105cm