Question

write the rules of sign convesion with diagram​

Answer 1

Rules of sign convention  ----

◆ all distances should be measured from pole to pole

◆ the distance measured in the direction of incident light , to be taken positive and measured in the opposite direction of incident light to be taken negative

◆ height of an object and height of an image are positive if measured upwards from the axis and negative if measured downward

◆ for a concave mirror f and R are negative and for a convex mirror they are positive

Answer 2

Explanation:

Rules for sign convention :

1.All distances should be measured from the pole.

2.The distances measured in the direction of incident light, to be taken positive and measured in the opposite direction of incident light to be taken negative.

3.Height of object and height of image are positive if measured upward from the axis and negative if measured downward.

4.For a concave mirror 'f and ‘R’ are negative and for a convex mirror these are positive.