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30. Which of the following statements is/are true? [NCERT Exemplar Problems] (a) A convex lens has 4 dioptre power having a focal length 0.25 m (b) A convex lens has -4 dioptre power having a focal length 0.25 m (c) A concave lens has 4 dioptre power having a focal length 0.25 m (d) A concave lens has – 4 dioptre having a focal 0.25 m

30. Which of the following statements is/are true? [NCERT Exemplar Problems]
(a) A convex lens has 4 dioptre power having a focal length 0.25 m
(b) A convex lens has -4 dioptre power having a focal length 0.25 m
(c) A concave lens has 4 dioptre power having a focal length 0.25 m
(d) A concave lens has – 4 dioptre having a focal 0.25 m

Grade:12th pass

1 Answers

Pawan Prajapati
askIITians Faculty 60796 Points
one year ago
Answer: a

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