The radius of curvature of a concave mirror is 20 cm. Its focal length with proper sign will be

Options :
  1. +10 cm
  2. -10 cm
  3. +20 cm
  4. - 20 cm

Answer and Explanation :-

Answer: Option 2


Sorry there is no explanation for this answer. Please help others by posting your response below

How do you rate this queston?  Very Easy  Easy  Average  Above Average  Tough

Previous Question : A light ray is incident normally on a plane mirror, the angle of reflection will be

Next Question : If an object is placed at a distance of 10 cm in front of a concave mirror of focal length 20 cm, th...

Click here for free online test on Optical Physics


 (Getemail alerts when others member replies)

All our knowledge has its origin in our perceptions
-Leonardo da Vinci