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44. If the power of a lens is – 2 D, what is its focal length? (a) +50 cm (b) -100 cm (c) -50 cm (d) +100 cm

44. If the power of a lens is – 2 D, what is its focal length?
(a) +50 cm
(b) -100 cm
(c) -50 cm
(d) +100 cm

Grade:12th pass

1 Answers

Pawan Prajapati
askIITians Faculty 8740 Points
3 months ago
Answer: c

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