Question

write the rules of sign conversation ​

Answer 1

Rules-

• object is always placed to the left of mirror.
• All distances are measured from the pole of the mirror.
• distance measured in the direction of the incident Ray are positive and the distances measured in the direction opposite to that of the incident Ray are negative.

Answer 2

• All distances should be measured from the pole.
• 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.
• Height of object and height of image are positive if measured upward from the axis and negative if measured downward.
• For a concave mirror 'f and ‘R’ are negative and for a convex mirror these are positive.