Question # 1

Hard disk is made of:

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Aluminium

Copper

Iron

Plastic

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

Which of the following quantities is not change during refraction of light?

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Its direction

Its speed

its frequency

Its wavelength

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

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Princpal focus

Focal length

P

Image

An object of placed at he centre of curvature of a concave mirror. The image produced by the mirror is located:

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out beyond the centre of curvature.

at the centre of curvature

between the centre of curvature and the focal point

at the focal point

Power of lens is:

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q/p

1/q

1/p

1/f

What does the term e-mail stand for:

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Emergency mail

Electronic mail

Extra mail

External mail

Which types of image is formed by a concave lens on a screen?

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Inverted and real

Inverted and virtual

upright and real

Upright and virtual

The mirror whose outer surface is reflecting is called:

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Concave mirror

Convex mirror

Lens

Mirror

In totally reflecting prism one angle is of 90^o, and other two angles are of:

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30^o,30^o

45^o,90^o

45^o,45^o

40^o,40^o

The mirror whose inner surface is reflecting is called:

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Concave mirror

Convex mirror

Miroor

Lens

How does sound travel from its source to your ear:

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By changes in air pressure

By vibration in wires or strings

By electromagnetic waves

By infrared waves

To see stomach problems we use:

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Gastroscope

Bronchoscope

Cystoscope

All of these

Critical angle for diamond is:

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60^o

24^o

26^o

49^o

CD which is made of soft material is called:

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Hard disk

Floppy disk

Iron disk

Copper disk

Half of radius of curvature is called:

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Focal length

Principal focus

Axis

None of these

The critical angle for a beam of light passing from water into air is 48.8 degrees. This mean that all light rays with an angle of incidence greater than this angle will be:

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Absorbed

Totallly reflected

Partially reflected and partially transmitted

Totally transmitted

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