Ray Optics-Power of a Lens (KVPY Stream-SA (Class 11) Physics): Questions 1 - 2 of 2

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Question number: 1

» Ray Optics » Power of a Lens

MCQ▾

Question

A convex lens of focal length 21 cm and a concave lens of focal length 17 cm are placed in close contact with one another. The power of the combination is –

Choices

Choice (4) Response

a.

2.43 D

b.

-2.43 D

c.

0.41 D

d.

-1.12 D

Question number: 2

» Ray Optics » Power of a Lens

MCQ▾

Question

A convex lens of focal length 39 cm and a concave lens of focal length 20 cm are placed in close contact with one another. The power of the combination is –

Choices

Choice (4) Response

a.

0.41 D

b.

-2.43 D

c.

2.43 D

d.

-0.41 D

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