Question # 1

The location of near point changes with

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Age

Size of the eye

Sharpness of the eye

None of these

Which is not the essential component of a spectrometer.

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Collimator

Telescope

Turntable

Microscope

The magnifying power is also called

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Resolving power

Angular magnification

Strength of eye

None of these

Multimode step index fiber is useful for.

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Long distance

Sort distance

Very long distance

Infinite distance

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

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

The focal length of convex lens

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Negative

Positive

small

Large

Reapters are placed in new system at distance of.

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30 km

50 km

80 km

100 km

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

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 speed of light was measured correctly by

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Galileo

Michelson

Newton

Maxwell

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

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Michelson

Hygen's

Galileo

Ability

The optical fiber is covered for protection by a

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Glass Jacket

Plastic Jacket

Copper Jacket

Aluminum Jacket

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 minimum distance from eye at which an object appears to be distinct is

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Near point

Focal length

Image distance from lens

Object distance from lens

The units of magnifying power of microscope or telescope are.

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Metre

m^-1

dioptre

No unit

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