SSC (Marathi Semi-English) 10thMaharashtra State Board
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# 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. - SSC (Marathi Semi-English) 10th - Science and Technology - 1

ConceptRefraction at Spherical Surfaces and by Lenses Power of a Lens

#### Question

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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#### APPEARS IN

2017-2018 (March) (with solutions)
Question 3.5 | 3.00 marks
Solution 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. Concept: Refraction at Spherical Surfaces and by Lenses - Power of a Lens.
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