Question # 1

Snell' law is:

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n = sin<x/sin <r

n=sin <i/sin<r

n = sin <r/sin<i

<i/<r

The critical angle for glass to:

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24^o

48^o

42^o

50^o

Hard disk is made of:

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Aluminium

Copper

Iron

Plastic

A normal eye can see near objects clearly at a distance of:

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20 cm

25 cm

30 cm

35 cm

The distance between principal focus and pole of mirror is called:

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Princpal focus

Focal length

P

Image

Spherical mirrors are used in:

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Medical

Search light

Microscope

All of these

The ray of light striking to the side of prism is called:

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refraction ray

incident ray

reflected ray

emergent ray

What does the term e-mail stand for:

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Emergency mail

Electronic mail

Extra mail

External mail

Focal length for concave mirror is :

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-ve

+ve

same

none of these

The distance of the object from the mirror is represented by :

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q

p

m

F

Which types of image is produced by the converging lens of human eye if it view a distant object?

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Real , erect, same size

Real, inverted, diminshed

Virtual, erect,diminshed

Virtual, inverted, magnified

To see from submarine the ship at the surface of water , we use:

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Telescope

Microscope

Peri scope

Prism

The index of refraction depends on:

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The focal length

The speed of light

the image distance

The object distance

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