Why does a ray of light parallel to the principal axis

+1 vote
24 views
asked Jan 20, 2018 in Physics by Kundan kumar (49,132 points) 34 381 1016

Why does a ray of light parallel to the principal axis
(i) bend towards the principal axis in the case of a concave mirror and
(ii) goes away from the principal axis in the case of a convex mirror as shown here?

1 Answer

+1 vote
answered Jan 20, 2018 by Vikash Kumar (144,729 points) 8 11 21
selected Jan 20, 2018 by Kundan kumar
 
Best answer

A ray of light incident on any spherical mirror follows laws of reflection.
(i) In case of a concave mirror, the line joining the point of incidence ray and the center of curvature forms the normal as shown. The reflected ray goes on the other side of the normal following laws of reflection.

(ii) In the case of a convex mirror, the normal at the point of incidence is as shown. The reflected ray goes on the other side of the normal. Following laws of reflection as shown. Hence, it goes away from the principal axis.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

One Thought Forever

“There is a close connection between getting up in the world and getting up in the morning.“
– Anon
~~~*****~~~

...