Question # 1

If a convex lens is used as a magnifying glass, whcih lens will give higher magnification that has.

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Short size

Long focal length

Large size

Short focal length

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

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Resolving power

Magnification

Scattering

Reflection

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

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5

6

10

23

If an object is placed with in the focal length of a convex lens, its image is formed.

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Real

Inverted

Virtual

Smaller than object

The final image formed by a simple microscope.

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Virtual and inverted

Real and erected

Virtual and erected

Real and inverted

A convex lens can be used as

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Simple microscope

Compound microscope

Telescope

Spectrometer

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

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Jacket

Plastic

Cladding

Rubber

The final image seen through ey piece in telescope is.

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Real, enlarge and inverted

Vertual, enlarge and erect

Virtual, enlarge and inverted

In Real, enlarge and erect

Information carrying capacity of optical fibre called.

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Capacity

Band width

Immunity

Ability

The location of near point changes with

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Age

Size of the eye

Sharpness of the eye

None of these

Multimode step index fiber is useful for.

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Long distance

Sort distance

Very long distance

Infinite distance

The types of optical fibres are

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Three

Four

Five

Six

Image formed by a concave lens is

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Real

Virtual

Erect

None of these

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

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Michelson

Hygen's

Galileo

Ability

Reapters are placed in new system at distance of.

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30 km

50 km

80 km

100 km

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 least distance of distinct vision for the normal eye is.

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15 cm

25 cm

125 cm

25 m

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