Ray Optics-Mirror Formula (KVPY Stream-SA (Class 11) Physics): Questions 4 - 5 of 5

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Question number: 4

» Ray Optics » Mirror Formula

MCQ▾

Question

In a concave mirror, an object is placed at a distance 25 cm from the focus and its image is formed at a distance 4 cm from the focus. The focal length of the mirror is,

Choices

Choice (4) Response

a.

15 cm

b.

20 cm

c.

10 cm

d.

5 cm

Question number: 5

» Ray Optics » Mirror Formula

MCQ▾

Question

In a concave mirror, an object is placed at a distance 27 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.

9 cm

b.

4 cm

c.

5 cm

d.

3 cm

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