A man who wears glasses of power 3 diopters must hold a newspaper at least 25 cm away to see the print clearly. How far away would the newspaper have to be if he took off the glasses and still wanted clear vision?
Text Solution
Verified by ExpertsThe correct answer is:
A
The virtual image formed by the lens is at the naked eye's true near point.
∴ P = 25 cm
f = 
= 
m = 33.3 cm
∴ 
+ 
= 
∴ 
= – 0.01
∴ q = – 100 cm
∴ When the man is not wearing the glasses he should hold the newspaper 1m away for clear vision.
The answer is .
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 double convex lens of glass of μ μ = 1.5 has radius of curvature of each of its surface is 0.2 m.…
A convex lens of focal length 25 cm and a concave lens of focal length 10 cm are joined together. T…
The focal lengths of convex lens for red and blue light are 100 cm and 96.8 cm respectively. The di…
The power of an achromatic convergent lens of two lenses is + 2 D . The power of convex lens is + 5…
A thin glass (refractive index 1.5) lens has optical power of in air. It's optical power in a liqu…
Dispersive power depends upon