Ray Optics-Mirror Formula (KVPY Stream-SA (Class 11) Physics): Questions 1 - 3 of 5

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Question number: 1

» Ray Optics » Mirror Formula

Appeared in Year: 2013

MCQ▾

Question

A horizontal parallel beam of light passes through a vertical convex lens of focal length 20 cm and is then reflected by a tilted plane mirror so that it converges to a point I. The distance PI is 10 cm.

A beam of light passes through a convex lens and a mirror.

A Beam of Light Passes Through a Convex Lens and a Mirror.

Figure shows a horizontal parallel beam of light passes through a vertical convex lens of focal length 20 cm and is then reflected by a tilted plane mirror so that it converges to a point I.

M is a point at which the axis of the lens intersects the mirror. The distance PM is 10 cm. The angle which the mirror makes with the horizontal is,

Choices

Choice (4) Response
a.

15°

b.

45°

c.

60°

d.

30°

Question number: 2

» Ray Optics » Mirror Formula

Appeared in Year: 2012

MCQ▾

Question

A convex lens of focal length 15 cm is placed in front of a plane mirror at a distance 25 cm from the mirror. Where on the optical axis and from the centre of the lens should a small object be placed such that the final image coincides with the object?

Choices

Choice (4) Response
a.

15 cm and on the opposite side of the mirror

b.

15 cm and between the mirror and the lens

c.

7.5 cm and between the mirror and the lens

d.

7.5 cm and on the opposite side of the mirror

Question number: 3

» Ray Optics » Mirror Formula

MCQ▾

Question

In a concave mirror, an object is placed at a distance 12 cm from the focus and its image is formed at a distance 3 cm from the focus. The focal length of the mirror is,

Choices

Choice (4) Response
a.

4 cm

b.

5 cm

c.

6 cm

d.

3 cm

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