# Ray Optics (KVPY (Kishore Vaigyanik Protsahan Yojana) Stream-SA (Class 11) Physics): Questions 1 - 3 of 26

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## Question number: 1

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

Appeared in Year: 2011

MCQ▾

### Question

A convex lens is used to form an image of an object on a screen. If the upper half of the lens is blackened so that it becomes opaque, then

### Choices

Choice (4) Response

a.

the image position shifts towards the lens

b.

the image position shifts away from the lens

c.

only half of the image will be visible

d.

the brightness of the image reduces

## Question number: 2

» Ray Optics » Total Internal Reflection

Appeared in Year: 2011

MCQ▾

### Question

Light enters an isosceles right triangular prism at normal incidence through face AB and undergoes total internal reflection at face BC as shown below.

The minimum value of the refractive index of the prism is close to

### Choices

Choice (4) Response

a.

1.55

b.

1.42

c.

1.10

d.

1.72

## Question number: 3

» Ray Optics » Reflection and Refraction of Light » Spherical Surface

Appeared in Year: 2011

MCQ▾

### Question

A student sees the top edge and the bottom center C of a pool simultaneously from an angle θ above the horizontal as shown in the figure. The refraction index of water which fills up to the top edge of the pool is . If then cos θ is,

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page