Home
Class 11
PHYSICS
A girl is using speces of f = -50 cm. Na...

A girl is using speces of `f = -50 cm`. Name the defect of her vision and calculate power of lens to be used.

Text Solution

Verified by Experts

As `f` is negative, the lens is concave. The girl is suffering from myopia,
`P = (100)/(f) = (100)/(-50) = - 2 D`.
Promotional Banner

Topper's Solved these Questions

  • RAY OPTICS

    PRADEEP|Exercise Very Short Answer (b)|31 Videos

  • RAY OPTICS

    PRADEEP|Exercise Very Short Answer (c)|27 Videos

  • RAY OPTICS

    PRADEEP|Exercise Conceptual problem(c)|8 Videos

  • PROPERTIES OF BULK MATTER

    PRADEEP|Exercise Multiple choice questions|7 Videos

  • SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

    PRADEEP|Exercise Assertion- Reason Type questions|20 Videos

Similar Questions

Explore conceptually related problems

Name one of the common defects of vision and the type of lens used to remove it.

Name any two defects of vision which can be corrected by using spectacles.

A person is unable to see objects distinctly placed within 50 cm from his eyes. (a) Name the defect of vision the person is suffering from and list its two possible causes. (b) Draw ray diagram to show the defect in the above case. (c) Mention the type of lens used by him for the correction of the defect and calculate its power. Assume that the near point for the normal eye is 25 cm. (d) Draw a labelled diagram for the correction of the defect in the above case.

Name the defect of vision in which the eye-lens loses its power of accommodation due to old age.

Name the defect of vision which makes the eye-lens cloudly resulting in blurred vision.

An optical instrument uses eye-lens of power 16 D and objective lens of power 50D and has a tube length of 16.25 cm. Name the optical instrument and calculate its magnifying power if forms the final image at infinity.