In new Cartesian sign convention distances measured in the direction of incident light ray are taken as
positive and distances measured against the direction of incident light ray are taken as negative.
(i) According to the new Cartesian sign convention
(a) Focal length of concave mirror is -ve and that of convex mirror is +ve
(b) Focal length of concave mirror is -ve and that of convex mirror is -ve
(c) Focal length of both concave and convex mirror is -ve
(d) Focal length of both concave and convex mirror is +ve
(ii) Which of the following statement is incorrect for concave mirror?
(a) The image distance is always positive.
(b) The image distance can be positive or negative.
(c) The focal length is negative.
(d) Height of the image can be positive or negative.
(iii) The height of the real image is (a) positive (b) negative
(c) Sometime positive or sometime (d) cannot say.
(iv) When linear magnification is negative, the image formed by mirror must be
(a) Erect (b) virtual (c) real and erect (d) real and inverted
(v) Linear magnification produced by a convex mirror is always positive. This is because
(a) Image formed by a convex mirror is always virtual and erect.
(b) Image formed by a convex mirror is real.
(c) Convex mirror is small mirror.
(d) Image formed by a convex mirror is always smaller in size than the object.
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