We appreciate your visit to A person cannot see an object lying beyond 80 cm whereas a normal person can easily see an object at a distance of 160 cm. This page offers clear insights and highlights the essential aspects of the topic. Our goal is to provide a helpful and engaging learning experience. Explore the content and find the answers you need!
Answer :
Final answer:
To correct farsightedness, a convex lens with a focal length of 20 cm (Choice a) would be used to converge light rays, allowing the person to see objects clearly beyond 80 cm.
The correct option is, Convex lens, f = 20 cm, which is, (a).
Explanation:
The condition described is farsightedness (presbyopia or hyperopia), where a person can see distant objects but cannot clearly see objects that are close. To correct this vision defect, a convex lens is used, which converges the light rays before they enter the eye, effectively increasing the overall converging power of the eye's lens system.
Since a normal sighted person can see up to 160 cm and the farsighted person can only see up to 80 cm, we need to determine the focal length of the corrective lens that allows the person to see the object at 160 cm clearly. Applying the lens formula (1/f = 1/v - 1/u) and using the appropriate sign conventions where the object distance (u) is -80 cm (negative because it is on the same side of the lens as the incoming light) and we want the image distance (v) to be at least -160 cm (again negative), we can find the required focal length (f).
Considering the information provided and the correction required for farsightedness, the correct choice is: a) Convex lens, f = 20 cm.
Thanks for taking the time to read A person cannot see an object lying beyond 80 cm whereas a normal person can easily see an object at a distance of 160 cm. We hope the insights shared have been valuable and enhanced your understanding of the topic. Don�t hesitate to browse our website for more informative and engaging content!
- Why do Businesses Exist Why does Starbucks Exist What Service does Starbucks Provide Really what is their product.
- The pattern of numbers below is an arithmetic sequence tex 14 24 34 44 54 ldots tex Which statement describes the recursive function used to..
- Morgan felt the need to streamline Edison Electric What changes did Morgan make.
Rewritten by : Barada
