The incident light always moves from left to right because the object is always on the lenss left side. I All the distances are measured from pole of the mirror as origin. Describe The New Cartesian Sign Convention Used In Tutorix Describe the New Cartesian Sign Convention used in optics. . This is because according to the New Cartesian Sign Convention the distances on the left side of the mirror from the pole in front of the mirror are given a negative sign and in the concave mirror the focus lies in front of the mirror. The focal length of a concave mirror is negative and that of a convex mirror is positive. Draw a labelled diagram to illustrate this sign convention. All distances are taken positive. According to the new Cartesian sign convention the _____ of a curved mirror is taken at origin. New Cartesian Sign Convention for spherical lenses. This means that the image distance l is positive. Classic s
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