A man cannot see clearly the objects beyond a distance of 20 cm from his eyes. To see distant objects clearly he must use which kind of lenses and of what focal length
Text Solution
Verified by ExpertsThe correct answer is:
D
f = – (defected far point) = – 20 cm
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
A convex lens of power + 6 D is placed in contact with a concave lens of power – 4 D . What is the …
A lens of focal power 0.5 D is
A lens which has focal length of 4 cm and refractive index of 1.4 is immersed in a liquid of refrac…
A convex lens has 9 cm focal length and a concave lens has – 18 cm focal length. The focal length o…
A double convex thin lens made of glass of refractive index 1.6 has radii of curvature 15 cm each. …
A candle placed 25 cm from a lens, forms an image on a screen placed 75 cm on the other end of the …