CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Power of a Lens

Which type of...

Question

Which type of lens has (a) a positive power, and (b) a negative power ?

Open in App

Solution

The power of a lens is the measure of its ability to converge or diverge a parallel beam of light on refraction through it .Negative sign for Concave lens and Positive sign for Convex lens. The S.I.unit of power is dioptre (D).

Suggest Corrections

thumbs-up

10

Similar questions

Q. Which type of lens has (a) a positive power, and (b) a negative power?

Q. The power of corrective lens used for which defect has a positive power?

Q. According to conventions, the power of corrective lens used for which defect has a positive power?

Q. Convex lens has positive power.

Q. In a Std. X class, out of

40

10

students use spectacles,

2

students have positive power and

8

students have negative power of lenses in their spectacles.
Answer the following questions :
(i) What does the negative power indicate?
(ii) What does the positive power indicate?
(iii) Generally which type of spectacles do most of the students use?
(iv) What defect of eyesight do most of the students suffer from?
(v) Give two possible reasons for the above defect.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Lens Formula, Magnification and Power of Lens

PHYSICS

Watch in App

explore_more_icon

Explore more

Power of a Lens

Standard X Physics

Join BYJU'S Learning Program

CrossIcon