Question # 1

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 ratio of image height to object height is called:

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Linear magnification

Power

Refraction

Radius of curative

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

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q

p

m

F

Hard disk is made of:

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Aluminium

Copper

Iron

Plastic

The mirror whose outer surface is reflecting is called:

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Concave mirror

Convex mirror

Lens

Mirror

Optical fibers work on the principle of:

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Refraction

Reflection

Total internal reflection

Diffraction

In a convex mirror the size of the image:

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Is smaller than the size of the object

Is greater than the size of the object

Depends upon the position of the object

Is equal to the size of the object

Critical angle for diamond is:

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60^o

24^o

26^o

49^o

Snell's law is stated as:

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Sin i / sin r = n1/n2

sin i / sin r = n2/n1

sin r / sin i = n2/n1

sin r / sin i = 2n2/n1

The totally reflectiing prism one angle is of:

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45^o

90^o

180^o

120^o

The distance between two consecutive waves compressions or rarefactions is called:

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Focal length

Wave length

Frequency

Time period

An object is 14 cm is front of a convex mirror. The image is 5.8 cm behind the mirror. What is the focal length of the mirror?

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4.1 cm

8.2 cm

9.9 cm

20 cm

The centre of spherical mirror is called:

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Focus

Axis

Centre

Pole

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