Question

a convex mirror is used to reflect light from an object placed 30 cm in front of the mirror if the focal length of the mirror is 20cm then the location of the image should be

Answer 1

We have convex mirror

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

U =-30cm

f=20cm

Putting values in formula

$\frac{1}{v} + \frac{1}{-30}=\frac{1}{20}$

V=12cm answer

that is image distance