# Solution - Refraction at Spherical Surfaces and by Lenses - Power of a Lens

Account
Register

Share

Books Shortlist
ConceptRefraction at Spherical Surfaces and by Lenses - Power of a Lens

#### Question

How unit of power related to focal length of a lens?

#### Solution

You need to to view the solution
Is there an error in this question or solution?

#### Similar questions VIEW ALL

A convex lens forms a real and inverted image of a needle at a distance of 50 cm from it. Where is the needle placed in front of the convex lens if the image is equal to the size of the object? Also, find the power of the lens.

view solution

A person needs a lens of power -5.5 dioptres for correcting his distant vision. For correcting his near vision he needs a lens of power +1.5 dioptre. What is the focal length of the lens required for correcting (i) distant vision, and (ii) near vision?

view solution

The far point of a myopic person is 80 cm in front of the eye. What is the nature and power of the lens required to correct the problem?

view solution

A doctor has prescribed a corrective lens of power +1.5 D. Find the focal length of the lens. Is the prescribed lens diverging or converging?

view solution

What is meant by power of a lens? Define its SI unit. You have two lenses A and B of focal lengths +10 cm and –10 cm, respectively. State the nature and power of each lens. Which of the two lenses will form a virtual and magnified image of an object placed 8 cm from the lens? Draw a ray diagram to justify your answer

view solution
Solution for concept: Refraction at Spherical Surfaces and by Lenses - Power of a Lens. For the course 8th-10th CBSE
S