Which of the following statement is incorrect (A) For a convex mirror magnification is always negative.

Question

Case study

A thin lens is a transparent optical medium bounded by two surfaces, at least one of which should be spherical. Applying the formula for image formation by a single spherical surface successively at the two surfaces of a lens, one can obtain the ‘lens maker formula’ and then the ‘lens formula’. A lens has two foci – called ‘first focal point’ and ‘second focal point’ of the lens, one on each side.

Which of the following statement is incorrect

(A) For a convex mirror magnification is always negative.

(B) For all virtual images formed by a mirror magnification is positive.

(C) For a concave lens magnification is always positive

(D) For real and inverted images, magnification is always negative

Answer 1

Correct option is : (A) For a convex mirror magnification is always negative.

(A) Incorrect the magnification for a convex mirror is always positive because the image is always virtual and upright

(B) Correct virtual images are always upright so magnification is positive

(C) Correct A concave lens always forms virtual, upright and diminished images, giving positive magnification.

(D) Correct, Real images are inverted and magnification is negative