Question

According to the new Cartesian sign convention used for lenses, distances measured opposite to the direction of incident light are taken as:

विकल्प

• Zero

• Negative

• Infinite

• Positive

Answer 1

In the new Cartesian sign convention, all distances are measured from the optical centre of the lens. Distances measured in the direction of incident light are positive, while distances measured opposite to the direction of incident light are negative.