MPSC PYQScienceLightenglish

12)a) Focal length of concave mirror and concave lens is always negative. (b) Focal length of Convex mirror and convex lens is always positive. Answer Options: 1) a correct , b incorrect 2) a and b correct 3) a and b incorrect 4) a incorrect, b correct

A.(a) correct , b incorrect
B.(a) and b correct
C.(a) and b incorrect
D.(a) incorrect, b correct

Correct answer: B

Source paper

Science: Light

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