Question

Write the mirror formula for the case of convex mirror. What are the assumptions made in this derivation? [2 MARKS]

Answer 1

Each point: 1 Mark

1. We know $u=–ve$

$v=+ve$

$f=+ve$

$\frac{1}{f}$ = $\frac{1}{v}$ + $\frac{1}{-u}$

Therefore $\frac{1}{f}$ = $\frac{1}{v}$ - $\frac{1}{u}$


2. Assumption: The object is placed between the pole and infinity.