Sign conversation for spherical mirror and lenses?
Answers
Answer:
Sign is taken as – (negative) from pole of a spherical mirror towards object along the principal axis. This means sign is always taken as – (negative) in front of a spherical mirror. For example; the distance of object is always taken as – (negative) in case of both types of spherical mirror, i.e. concave and convex mirrors.
Sign is taken as + (positive) behind the spherical mirror. For example if an image is formed behind the mirror, the distance of image is taken as + (positive) from pole along the principal axis.
The height of is taken as + (positive) above the principal axis and taken as – (negative) below the principal axis.
Hope it helps you.
Answer:
Sign convention is a set of rules to set signs for image distance, object distance, focal length, etc. for mathematical analysis of image formation. According to it, object is always placed to the left of lens. All distances are measured from the optical centre of the mirror.
Sign Convention for Spherical Mirrors: Distances are to be measured from the pole of the mirror marked by point V in the figure. Distances measured along the direction of the incident ray are +ve. The distance measured opposite the direction of the incident ray are -ve.
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