Sign Convention for Mirrors

According to the "New Cartesian Sign Convention" for mirros, when sigh has been given to the focal length of : (i) a concave mirror ? (ii) a convex mirror ?

Spherical Mirror||Sign Convention||Mirror Formula||Magnification

State and explain the New Cartesian Sign Convention for spherical lenses.

Convention of Signs

State the Cartesian sign convention for refraction of light (image formation ) by a lens.

Image Formation By Concave Lens|Sign Convention For Spherical Lenses|Lens Formula|Magnification (m)|OMR

An ideal gas enclosed in a cylinder fitted with a frictionless and weightless piston, pushes it outside. What would be the sign convention for the work ?

Thermodynamics System |Types Of System |Thermodynamics State |Zeroth Law Of Thermodynamics |Sign Convention |Work Done By A Gas

What are the Cartesian sign convention for refraction of light (image formation) by a lens . Draw diagrams to illustrate the same.

What would be the sign convention for work done on a system for a cylinder containing one mole of an ideal gas where P_(ext) = P_(int) ?