Home
Class 10
PHYSICS
A man can see only between 75 cm and 200...

A man can see only between `75 cm` and `200 cm` . The power of lens to correct the near point will be

A

`+8//3 D`

B

`+3 D`

C

`- 3 D`

D

`-8//3 D`

Text Solution

Verified by Experts

The correct Answer is:
A
For improving near point , conve lens is required and for this convex lens
`therefore(1)/(f)=(1)/(-75)-(1)/(-25)rArrf=(75)/(2)cm`
So power `P=(100)/(f)=(100)/(75//2)=+(8)/(3)D`
Promotional Banner

Topper's Solved these Questions

  • OPTICAL INSTRUMENTS

    CENGAGE PHYSICS|Exercise CHALLENGING EXERCISE |5 Videos

  • NATURE OF LIGHT AND PHOTOELECTRIC EFFECT

    CENGAGE PHYSICS|Exercise Olympiad and NTSE Level Exercises|9 Videos

  • REFRACTION OF LIGHT

    CENGAGE PHYSICS|Exercise OLYMPIAD AND NSE LEVEL EXCERCISES |10 Videos

Similar Questions

Explore conceptually related problems

A man can see the object between 15 cm and 30 cm . He uses the lens to see the far objects. Then due to the lens to see the far objects. Then due to the lens used, the near point will be at

A person cannot see objects clearly beyond 125 cm. The power of the lens to correct the vision is

A person can not see objects beyond 50cm .The power of a lens to correct this vision will be

A short sighted person can see distinctly only those objects which lie between 10 cm and 100 cm from him. The power of the spectacle lens required to see a distant object is

A person can see the objects lying between 25 cm and 10 m from his eye. His vision can be corrected by using lens of power - 0.1 D , Is the statement true or false ?

A nearsighted person cannot clearly see beyond 200 cm. Find the power of the lens needed to see objects at large distances.