Question 33

The radius of curvature of a concave mirror is 30 cm. Following Cartesian Sign Convention, its focal length is expressed as:

Solution

Focal length is half of radius.
Then, f = 30/2 = 15 cm
For a concave mirror, focal length will be negative. Hence, f = -15 cm

Share on Whatsapp Share on Whatsapp

Create a FREE account and get:

Download RRB Study Material PDF
45+ RRB previous papers with solutions PDF
300+ Online RRB Tests for Free

Follow us on

Boost your Prep!

Download App