Write the any four new Cartesian sign convention
Answers
Answer:
Cartesian Sign Convention: In the case of spherical mirror all signs are taken from Pole of the spherical mirror, which is often called origin or origin point. This sign convention is known as New Cartesian Sign Convention.
Sign is taken as – (negative) from pole of a spherical mirror towards object along the principal axis. This means sign is always taken as – (negative) in front of a spherical mirror. For example; the distance of object is always taken as – (negative) in case of both types of spherical mirror, i.e. concave and convex mirrors.
Sign is taken as + (positive) behind the spherical mirror. For example if an image is formed behind the mirror, the distance of image is taken as + (positive) from pole along the principal axis.The height of is taken as + (positive) above the principal axis and taken as – (negative) below the principal axis.
Focal length is half the radius of the mirror.
So f=30/2=15cm
With a spherical mirror this is not the focal length, as rays do not converge in one point, depending on their distance from the optical axis. But for small mirrors this will
Hi friend_______,
Cartesian sign conventions are used for measuring the various distances in the ray diagrams of spherical lenses. According to Cartesian convention:
★ The object is always placed on the left side of the lens.
★ All the distances are measured from the optical centre of the lens.
★ The distances measured in the same direction as that of incident light are taken as positive.
★ The distances measured against the direction of incident light are taken as negative.
★ The distances measured upward and perpendicular to the principal axis is taken as positive.
★ The distances measured downward and perpendicular to the principal axis is taken as negative.