Question # 1

The optical fiber is covered for protection by a

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Glass Jacket

Plastic Jacket

Copper Jacket

Aluminum Jacket

The device used to study the spectra from different sources of light is

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Telescope

Optical fibre

Spectrometer

Microscope

The diameter of a lens is called

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Focal length

Aperture

Principle axis

Centre

The speed of light was measured correctly by

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Galileo

Michelson

Newton

Maxwell

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

A layer over the central core of the jacke is called.

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Jacket

Plastic

Cladding

Rubber

In Michelson's experiment the relation used to find the speed of light is

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16 fc

1/16 fd

16 fd

16/fd

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

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Resolving power

Magnification

Scattering

Reflection

Total confined light is obtained by

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Total internal reflection

Refraction of light

Diffraction

Polarization

Information carrying capacity of optical fibre called.

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Capacity

Band width

Immunity

Ability

__ will travel faster than other through an optical fibre.

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Ultraviolet light

Visible light

Infrared light

White light

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

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Michelson

Hygen's

Galileo

Ability

Multimode graded index fibre has a core whose diameter range lie from.

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5 to 50 micro meter

50 to 100 micro meter

40 to 1000 micro meter

50 to 10,000 micrometer

Image formed by a concave lens is

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Real

Virtual

Erect

None of these

The final image formed by a simple microscope.

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Virtual and inverted

Real and erected

Virtual and erected

Real and inverted

the final image obtained by astronomical telescope is.

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Erect

Virtual

Magnified

All of these

If focal length of objective and eye piece is 0.5 m and 10 cm respectively then magnifying power of telescope will be.

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0.5

5

10

20

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