Q. 84.1( 7 Votes )

How can we find the (rough) focal length of a concave mirror?

Answer :

Method We can put the object far away from the concave mirror and place the screen where the image is formed. The place where the image formed is sharpest is the focus of the mirror, measure the distance between the focus and mirror to get the focal length.



Explanation When an object is kept at the infinity than the image is formed at the focus of the concave mirror.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Foundation | How to Solve Numericals on Mirror Formula58 mins
Foundation | NTSE Most Challenging Numericals37 mins
Quiz | Introduction to Light55 mins
Introduction to Spherical LensFREE Class
What is Refraction?45 mins
How to Ace Physics in NTSE 2020?41 mins
Image Formation by Concave Mirror47 mins
Light and it's Reflection58 mins
Reflection of Light - Plane Mirrors51 mins
Lets Understand The Reflection of Light49 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses