Question # 1

The data stored in C.D is:

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680 MB

650 MB

700 MB

750 MB

Which is an example of a longitudinal wave:

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Sound wave

Light wave

Radio wave

Water wave

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

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20 cm

25 cm

30 cm

35 cm

Power of convex lens is 10 D. Its focal length is:

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100 m

10 m

1 m

0.1 m

Magnification of mirror is given by:

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m=p/q

m=q/p

m=pxq

m=1/p+q

The point through which rays of light pass after reflection from concave mirror is called principal:

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Focus

Circle

Axis

Radius

The mirror whose outer surface is reflecting is called:

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Concave mirror

Convex mirror

Lens

Mirror

____________ is always virtual in case of convex mirror.

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p

image

object

all of these

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

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Telescope

Microscope

Peri scope

Prism

Spherical mirrors are used in:

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Medical

Search light

Microscope

All of these

Angle opposite to the base of triangle of prism is called:

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angle of incidence

angle of refraction

angle of prism

emerging angle

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

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refraction ray

incident ray

reflected ray

emergent ray

Totally reflecting prism turns the incident ray at an angle of:

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90^o

60^o

75^o

45^o

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