Question # 1

Using a graded Index fibre, the time difference is reduced to about.

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1 ns per km

33 ns per 100 km

33 ns per km

1 ns per 100 km

If the object is at 5 cm from the lens of simple microscope than its magnifying power will be.

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5

10

15

25

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

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5

6

10

23

The optical fibre is covered for protection by

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Glass jacket

Plastic jacket

Steel jacket

Diamond jacket

the final image obtained by astronomical telescope is.

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Erect

Virtual

Magnified

All of these

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 light signal in Opticla fiber must be regenerated by advice called.

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Regenerator

Generator

Repeater

Diode

The ratio of size of image and size of object is

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Focal length

Magnification

Resolving power

Principle focus

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

Multimode step index fibre is useful for

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Long distances

Short distances

Better quality

Low price

Multimode step index fiber is useful for.

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Long distance

Sort distance

Very long distance

Infinite distance

The ability of reveal the minor details of an object under examination is called.

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Resolving power

Magnification

Scattering

Reflection

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

The accepted value for speed of light in vacuum

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2.99 x 10⁸m - sec^-1

2.99 x 10⁶m - sec^-1

2.99 x 10⁸km - sec^-1

2.99 x 10⁸m - h^-1

The optical fiber is covered for protection by a

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Glass Jacket

Plastic Jacket

Copper Jacket

Aluminum Jacket

A double convex lens acts as diverging lens when the object is

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At infinity

Inside the focus

A way from focus

A a large distance from lens

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

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Michelson

Hygen's

Galileo

Ability

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Physics Fsc Part 1 Chapter 10 Online Test MCQs With Answers

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