Ray Optics-Power of a Lens (NEET Physics): Questions 6 - 8 of 8

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Question number: 6

» Ray Optics » Power of a Lens

MCQ▾

Question

A slide projector lens has a focal length 10 cm. It throws an image of a 2cm × 2cm slide on a screen 5 m from the lens. Find the size of the picture on the screen

Choices

Choice (4) Response
a.

(78 × 78) cm 2

b.

(64 × 64) cm 2

c.

(88 × 88) cm 2

d.

(98 × 98) cm 2

Question number: 7

» Ray Optics » Power of a Lens

MCQ▾

Question

If the focal length of a magnifier is 5 cm calculate the power of the lens.

Choices

Choice (4) Response
a.

15 D

b.

20 D

c.

10 D

d.

5 D

Question number: 8

» Ray Optics » Power of a Lens

MCQ▾

Question

If the focal length of a magnifier is 5 cm find the magnifying power of the lens for relaxed and strained eye.

Choices

Choice (4) Response
a.

2×, 3×

b.

4×, 5×

c.

l×, 2×

d.

4×, 2×

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