Page 10 - cbse-class-10-light-reflection-and-refraction
P. 10
Characteristics of Focus of a Concave Mirror and a Convex Mirror
Convex mirror Concave mirror
The focal point is hidden behind the mirror. The focus is on the mirror.
Because the rays of light after reflection The focus exists because light rays
appear to come from the focus, the focus is converge at the focus after
virtual. reflection.
Sign Convention for Spherical Mirrors
In the ray diagrams of spherical mirrors, the following sign convention is used to
measure various distances:
The object is always positioned to the left of the mirror.
All distances are measured from the mirror's pole.
Distances measured in the direction of the incident ray are positive, while distances
measured in the opposite direction are negative.
Distances measured above the principal axis are positive, while distances measured
below the principal axis are negative.
Class X Science www.vedantu.com 10
