Question # 1

Multimode step index fiber is useful for.

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Long distance

Sort distance

Very long distance

Infinite distance

The magnification of a convex lens of focal length 5 cm is equal to.

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5

6

10

23

For normal adjustment what is the length of astronomical telescope if focal lengths of astronomical telescope if focal lengths of objective and eye piece are 100 cm 20 cm respectively.

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10 cm

20 cm

5 cm

120 cm

If an object lies at focus point F in front of a converd lens, its image is formed at.

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2F

F

3F

Infinity

The optical fiber is covered for protection by a

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Glass Jacket

Plastic Jacket

Copper Jacket

Aluminum Jacket

The light emitted from light emitting diode has wave length.

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1.1 micro meter

1.3 micro meter

1.5 micro meter

1.7 micro meter

Critical angle is that angle of incident ofr which angle of refraction is.

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90 ^o

45 ^o

42 ^o

24 ^o

The first person who attempted to measure the speed of light was.

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Michelson

Hygen's

Galileo

Ability

More details of an object can be seen with a microscope by using

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Green light

Red light

Yellow light

Blue light

Information carrying capacity of optical fibre called.

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Capacity

Band width

Immunity

Ability

The magnifying power of an astronomical telescope is 10. If the focal length of objective is 100 cm, then what is the focal length of eye piece.

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10 cm

100 cm

1000 cm

5 cm

The optical fibre is covered for protection by

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Glass jacket

Plastic jacket

Steel jacket

Diamond jacket

The focal length of convex lens

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Negative

Positive

small

Large

A convex lens acts as diverging lens if the object is placed at

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F

2F

Between F and 2 F

Within the F

The speed of light was measured correctly by

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Galileo

Michelson

Newton

Maxwell

The magnifying power of a convex lens of focal lendth 10 cm is

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7

9.6

11

3.5

The least distance of distinct vision for the normal eye is.

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15 cm

25 cm

125 cm

25 m

Critical angle is that incident angle in denser medium for which angle of refraction is.

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0 ^o

45 ^o

90 ^o

120 ^o

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Physics ICS Part 1 Chapter 10 Online Test MCQs With Answers

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