Ray Optics (NEET Physics): Questions 100 - 102 of 102

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Question number: 100

» Ray Optics » Lens Maker's Formula and Lens Formula

Appeared in Year: 2016

MCQ▾

Question

A person can see clearly object only when they lie between 50cm and 400cm from his eyes. In order to increase the maximum distance of distinct vision to infinity, the type and power of the correcting lens, the person has to use, will be:

Choices

Choice (4) Response

a.

Convex, +0.15 diopter

b.

Concave, 0.2 diopter

c.

Convex, +2.25 diopter

d.

Concave, 0.25 diopter

Question number: 101

» Ray Optics » Lens Maker's Formula and Lens Formula

Appeared in Year: 2016

MCQ▾

Question

Two identical glass (μg=32) equiconvex lenses of focal length f each are kept in contact. The space between that two lenses in filled with water (μw=43) . The focal length of the combination is –

Choices

Choice (4) Response

a.

f

b.

3f4

c.

4f3

d.

f3

Question number: 102

» Ray Optics » Reflection and Refraction of Light » Smooth Surface

Appeared in Year: 2016

MCQ▾

Question

An air bubble in a glass slab with refractive index 1.5 (near normal incidence) is 5 cm deep when viewed from one surface and 3 cm deep when viewed from the opposite face. The thickness (in cm) of the slab is –

Choices

Choice (4) Response

a.

12

b.

10

c.

8

d.

16

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