Question # 1

When light enters a denser medium

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Its speed slows down

Its speed increases

It is totally reflected

Its speed remains unchanged

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

A part of electromagnetic spectrum that can be detected by the human aye

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Angle of incidence

Angle of refraction

Light

Angle of reflection

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

What would be the colour of sky through hour the day .If the earth has no atmosphere.

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Blue

Red

White

Black

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

the depth of a pond is 4 m What is the apparent depth of the pond if the water level is 3.5 m high. The refractive index of water is 1.33

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1.9 m

2.3 m

3.13 m

4.5 m

In case of a convex lens when object is placed away from 2F, image is formed.

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at F

at 2F

away from 2 F

Between F and 2 F

The blooming of the image due to dispersion in lenses is called.

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spherical aberration

Chromatic aberration

Astigmation

Curvature of image field

A ray of light from air into glass The angle of incidence is 30o if the refractive index of glass in 1.52 The angle of refraction will be.

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16.7 ^o

19.3 ^o

29.6 ^o

39.3 ^o

The power of convex lens of focal length 50 cm will be

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1,0 dioptre

2.0 dioptre

4.0 dioptre

5.0 dioptre

Parallel rays of light are focused by a thin convex lens.A thin concave lens of the name focal length is then joinjed to the convex lens The focal point will.

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Shift to infinity

shift towards the lens by a small distance

shift away from he lens by a small distance

Remain at its original position

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

The image formed by a projector is

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Real, inverted and enlarged

Real, upright and enlarged

Real ,inverted and diminished

Virtual, upright and diminished

What is the focal length of a normal eye lens.

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1 mm

2 cm

25 cm

1 m

In case of a convex lens, when object is placed at F

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the image is formed beyond 2 F

the image is formed between F and 2 F

No image is formed

the image is formed behind the object

Which is the branch of medicine that deals with the anatomy physiology and diseases of the eye.

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Ophthalmology

Psychology

Andrology

Gynecology

The aberration in the image formed by a lens due to different wavelengths present in a source is called.

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Spherical aberration

Chromatic aberration

Astigmation

Achromatic aberration

Which of the following is used for the failure of a lens to form a sharp and distinct image.

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Distortion

Astrigmation

Chromatic aberration

spherical aberration

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

Which was the transparent front part of the eye that covers the pupil, iris and interior chamber.

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Cornea

Fovea

Sclera

Choroid

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