# Kavita from 10th is Using Spectacles. the Power of the Lenses in Her Spectacles is –2.5 Dioptre. Answer the Following Questions:Which Lenses Are Used in Her Spectacles? and State the Defect of Vision Kavita is Suffering From. - Science and Technology 1

Kavita from 10th is using spectacles. The power of the lenses in her spectacles is –2.5 dioptre. Answer the following questions:

1) Which lenses are used in her spectacles?

2) State the defect of vision Kavita is suffering from.

3) Find the focal length of the lenses used in her spectacles

#### Solution

1) Concave lens

2) Myopia or nearsightedness

3) f = 1/D = 1/2.5 = 0.4 m

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