# Ray Optics (KVPY (Kishore Vaigyanik Protsahan Yojana) Stream-SA (Class 11) Physics): Questions 9 - 12 of 26

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## Question number: 9

» 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: 10

» Ray Optics » Magnification

Appeared in Year: 2013

MCQ▾

### Question

In a car a rear view mirror having a radius of curvature 1.50 m forms a virtual image of a bus located 10.0 m from the mirror. The factor by which the mirror magnifies the size of the bus is close to,

### Choices

Choice (4) Response

a.

0.07

b.

0.06

c.

0.09

d.

0.08

## Question number: 11

» Ray Optics » Deviation and Dispersion of Light by a Prism

Appeared in Year: 2013

MCQ▾

### Question

The refractive index of a prism measured using three lines of a mercury vapour lamp. If μ1, μ2 and μ3 are the measured refractive indices for these green, blue and yellow lines respectively, then

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 12

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

MCQ▾

### Question

A convex lens made of material of refractive index 1.45 is immersed in a medium of refractive index 2.2. The two surfaces of the convex lens have the same radius of curvature 0.6 m. The lens will behave as a,

### Choices

Choice (4) Response

a.

Convergent lens of focal length 0.44 m.

b.

Divergent lens of focal length 0.44m

c.

Convergent lens of focal length 0.88 m

d.

Divergent lens of focal length 0.88 m.

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