An object is puts at a distance of 5 cm from the first focus of a convex lens of focal length 10 cm. If a real image is formed, its distance from the lens will be

Question

Dr. Abubacker · Accepted Answer

(d) $\frac{1}{v} - \frac{1}{u} = \frac{1}{f}$
$\frac{1}{v} - \frac{1}{- 15} = \frac{1}{10}$
Or $\frac{1}{v} = - \frac{1}{15} + \frac{1}{10}$
Or $\ \frac{1}{v} = \frac{- 2 + 3}{30}$
Or $\ v = 30\ cm$

Q. An object is puts at a distance of 5 cm from the first focus of a convex lens of focal length 10 cm. If a real image is formed, its distance from the lens will be

Explanation

Reviewed by Dr. Abubacker

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