Question

hello mates.

Class 10 cbse chapter-light:reflection and refraction.

Numericals of sign convention.(ex-how we know that we take u -ve,v+ve etc.)

Wright all of them:concave mirror,convex mirror,concave lens,convex lens.

Please answer fast!!!

25 points.....​

Answer 1

MIRROR
*Object placed on Left hand side is Taken as negative and objects/image on right hand side is taken as positive.
*Object is always placed on the Left Hand side
*All distances Parallel to the Principle axis is measured from the pole.
*Distance perpendicular to and above the principal axis is taken as positive and below the principal axis is taken as negative.
Lens
*Convex lens focal length will always be positive and concave lens focal length will always be negative.


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Answer 2

MIRROR

*Object placed on Left hand side is Taken as negative and objects/image on right hand side is taken as positive.

*Object is always placed on the Left Hand side

*All distances Parallel to the Principle axis is measured from the pole.

*Distance perpendicular to and above the principal axis is taken as positive and below the principal axis is taken as negative.

Lens

*Convex lens focal length will always be positive and concave lens focal length will always be negative.