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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

Harshit Singh , 3 Years ago
Grade 12th pass
anser 1 Answers
Pawan Prajapati

Last Activity: 3 Years ago

Answer: c

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