Question

list the new cartesian sign convention for reflection of light by spherical Mirrors draw a diagram and apply this convention for calculating the focal length and nature of a spherical mirror who forms a one by three times magnified virtual image of an object placed 18 cm in front of it ​

Answer 1

Answer:

New Cartesian Sign Conventions for reflection of light by spherical mirrors are given

below:

The object is always placed to the left of the mirror. This implies that the light from the object falls on the mirror from the left-hand side.

All distances parallel to the principal axis are measured from the pole of the mirror.

All the distances measured to the right of the origin (along + x-axis) are taken as positive while those measured to the left of the origin (along - x-axis) are taken as negative.

Distances measured perpendicular to and above the principal axis (along + y-axis) are taken as positive.

Distances measured perpendicular to and below the principal axis (along - y-axis) are taken as negative.