Question # 1

Which is the health care profession concerned with eyes as well as vision visual system and vision information processing in humans.

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Optometry

Ophthalmology

Telemetry

Psychology

Telecommunication by Optical fibers is done by

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Single mode step index fibre

Multimode step index fibre

Multimode graded index fibre

All of the above

On which of the following the object size as perceived by eye depends upon.

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Actual size of the object

Aperture of the pupil

Object distance from the eye

Size of the image formed on the retina

The image formed on the film of a simple camera is.

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Real inverted and diminished

Virtual, upright, and diminished

Virtual, upright and magnified

Real, inverted and magnified

Total internal reflection occurs when the angle of incidence is.

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Greater than the angle of refraction

Equal to the critical angle

Greater than the critical angle

Greater than 45^o

The erecting lens of a telescope produces

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A shorter instrument

wider field of view

A larger image

A sharp image

Which mirror be used for obtaining a parallel beam of light from a small lamp.

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Plane mirror

Convex mirror

Concave mirror

All of these

When of the following colours scatters minimum.

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Blue

Violet

Yellow

Red

Michelson used the equation to determine the speed of light.

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c = 4 fd

c = 8fd

c =12 fd

c = 18 fd

The ablate of rays of different colours to converge a single point sifter refraction though a convex lens is called.

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Come

Distortion

Spherical aberration

Chromatic aberration

Lenses are commonly made of.

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Glass only

Plastic only

Glass and clear plastic

Aluminium

The characteristic of an image formed by a plane mirror is.

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It is of the same size as the object

It is laterally inverted

It is upright

All of the above

An object is placed at the focus of a diverging lens The image is located at

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The focus

2 F

Infinity

Half away between the lens and the focus

Linear magnification is equal to the ratio of.

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Size of the object to the size of the image

Size of the image to the size of the object

size of the object focal length

Size of the image focal length

A person of height 1.5 m stands 2.0 m in front of a plane mirror How far from the person is her image .

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2.0 m

3.0 m

3.5 m

4.0 m

Larger the diameter of the objective of a telescope.

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Greater is its resolving power

Lesser is its resolving power

Lesser is its magnifying power

greater is its magnifying power

Rainbows and mirage are formed by

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Reflection only

Refraction only

dispersion only

A combination of refraction, total internal refraction and dispersion

Which phenomenon is responsible formation of shadows.

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Interference of light

Diffraction of light

Polarization of light

Propagation of light

When a light ray enters from air into water then its wavelength.

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Increases

Decreases

Become infinity

Remains constant

When a ray light is incident at anacute angle to the boundary of the media the refracted ray.

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Bends away from the normal

Bends towards the normal

Remains undedicated

Is totally reflected

Loss of power is optical fibre result into

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Poor receipt ion of signals

Delay in time for reception of signals

accurate information at the receivers

All of the above

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