According to New Cartesian Sign Convention : (a) focal length of concave mirror is positive and that of convex mirror is negative (b) focal length of both concave and convex mirrors is positive (c) focal length of both concave and convex mirrors is negative (d) focal length of concave mirror is negative and that of convex mirror is positive

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Solution

(i) Negative (Focus of concave mirror is formed at the left side of mirror. So it is negative in Cartesian Sign Convention)
(ii) Positive(Focus of convex mirror is formed at the right side of mirror. So it is positive in Cartesian Sign Convention)

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Q. According to New Cartesian Sign Convention:

(a) focal length of concave mirror is positive and that of convex mirror is negative
(b) focal length of both concave and convex mirrors is positive
(c) focal length of both concave and convex mirrors is negative
(d) focal length of concave mirror is negative and that of convex mirror is positive

Why focal length of convex mirror and convex lens is positive while concave mirror and concave lens negative?

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

Q. According to the "New Cartesian Singh Convention" for mirrors, what sign has been given to the focal length of:

(i) a concave mirror?
(ii) a convex mirror?

Q. According to the new cartesian sign convention, the focal length of a convex mirror is always negative.

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(i) Negative (Focus of concave mirror is formed at the left side of mirror. So it is negative in Cartesian Sign Convention) (ii) Positive(Focus of convex mirror is formed at the right side of mirror. So it is positive in Cartesian Sign Convention)

(i) Negative (Focus of concave mirror is formed at the left side of mirror. So it is negative in Cartesian Sign Convention)
(ii) Positive(Focus of convex mirror is formed at the right side of mirror. So it is positive in Cartesian Sign Convention)