A man can read a book kept at a distance of 20 cm. If book kept at 30 cm distance,
man uses spectacles to read this book. Calculate-(i) focal length of used lens,
(ü) nature of lens, (iii) clarify the defect of vision by drawliny rag diagram.
Answers
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2
Answer:
(i) 10 cm.
(ii) concave lens.
(iii) (it's in photo)
Explanation:
(i) 20+30= not able to read,
30-20=10=difference between able to read. and not able to read.
(ii) concave lens make smaller objects to look big.
(iii) please make my ans. as brilliant ans. please.
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Answered by
1
Answer:
Given, u = -20 cm, v = - 30 cm , P = ?
Explanation:
Given, u = -20 cm, v = - 30 cm , P = ?
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