Question

Signconvition of concave mirror

Answer 1

The sign convention for spherical mirrors which applicable to both concave and convex mirrors follows a set of rules known as the “New Cartesian Sign Convention”, as mentioned below:

a. The pole (p) of the mirror is taken as the origin.

b. The principal axis is taken as the x-axis of our coordinate system.

c. The object is always placed on the left side of the mirror which implies that light falling from the object on the mirror is on the left-hand side.

d. All the distances parallel to the principal axis are measured from the pole (p) of the mirror.

e. All the distances measured from the pole (p) on the right-hand side of the mirror are taken as positive and those on the left-hand side of the mirror are taken as negative.

f. Distances measured perpendicular to and above the principal axis are taken as positive.

g. All the distances below the principal axis are taken as negative.

Hope it helps :)