Question

which are the cartesian sign convention used in Optics for 11th standard​

Answer 1

The Cartesian sign convention. Let us take as an example an object 10 cm to the left of a converging lens of focal length 5 cm. In this case the object distance is l (lower case L) and is negative, as it is to the left of the "origin" of the axes. The focal length of the lens is positive.

Answer 2

answer:

Cartesian Sign Convention. 1) Light initially propagates from left to right. 2) The origin of the Cartesian coordinate system is at the centre of the optical component. ... 5) Acute angles are positive when produced by anticlockwise rotation from the optic axis, and negative when produced by clockwise rotation

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