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A doctor has prescribed a corrective …

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A doctor has prescribed a corrective lens of power -1.5 D. Find the focal length of the lens. Is the prescribed lens is divergent or converging

Posted by Preeti Senapati 5 years, 3 months ago

CBSE > Class 10 > Science

3 answers

Kedar Thakur 5 years, 3 months ago

P = 1/f f = 1/P f = 1/- 1.5 f = -0.6666 f = -0.67

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Riya Philip 5 years, 3 months ago

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Yogita Ingle 5 years, 3 months ago

P = -1.5 D

P = 1/f

f = 1/P = 1/(-1.5) = -0.666 m = -67 cm

Since focal length is negative, it is a diverging lens.

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CBSE > Class 10 > Science