Question # 1

Which is not the essential component of a spectrometer.

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Collimator

Telescope

Turntable

Microscope

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 focal length of convex lens

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Negative

Positive

small

Large

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

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Jacket

Plastic

Cladding

Rubber

The diameter of a lens is called

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Focal length

Aperture

Principle axis

Centre

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

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

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Regenerator

Generator

Repeater

Diode

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 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

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

Multimode step index fibre is useful for

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Long distances

Short distances

Better quality

Low price

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 final image formed by a simple microscope.

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Virtual and inverted

Real and erected

Virtual and erected

Real and inverted

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

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Resolving power

Magnification

Scattering

Reflection

The location of near point changes with

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Age

Size of the eye

Sharpness of the eye

None of these

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 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

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