Question

Obtain the mirror formula and write the expression for the linear magnification.

Answer 1

In the above figure Δ BAP and ΔB'A'P are similar

Linear magnification= – −v/µ , (alternatively m = h_i/h_o)

Detailed Answer :

 Mirror formula for concave mirror :- 

 When an object is placed beyond F, image formed is real, as 1 1 ∆ ≈∆ A B C ABC, So

Linear magnification produced by concave mirror is the ratio of the size of image I to the size of object 0 i.e.

 M = I/0 = -v/u