Question

How to learn Sign Convention for spherical lens and mirror?

Answer 1

 Spherical Mirrors Lenses Focal Length (f) + for concave mirrors + for a converging lens - for convex mirrors - for a diverging lens Object Distance ( do) + if object is in front of the mirror (real object) + if the object is to the left of the lens (real object) - if object is behind the mirror (virtual object) * - if the object is to the right of the lens (virtual object) * Image Distance ( di) + if the image is in front of the mirror (real image) + for an image (real) formed to the right of the lens by a real object - if the image is behind the mirror (virtual image) - for an image (virtual) formed to the left of the lens by a real object Magnification ( m) + for an image that is upright with respect to the object + for an image that is upright with respect to the object - for an image that is inverted with respect to the object -for an image that is inverted with respect to the object.
 

Answer 2

aap apne technical soch jaise u is always negative etc.