Question # 1

Shadow formation and the pin hole camera illustrate the

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Phenomenon of reflection

Phenomenon of refraction

Phenomenon of total internal reflection

Rectilinear propagation of light

A double convex an bubble in water will behave as.

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Plane slab

Concave mirror

Convex lens

Concave lens

The phenomenon of total internal reflection occurs in

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Optical fibre

Rainbow

Mirage

All of these

The relation between refractive index an critical angle is.

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sin C =1/n

sin n = 1/C

sin c = 1

n = sin C

The variation of focal length of a lens when we pass from the central portion to periphery is called.

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Coma

Astigmatism

Spherical aberration

Chromatic aberration

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 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

The image of an object 5 mm high is only 1 cm high. The magnification of the lens is

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0.2

0.5

1

2

Which of the following colours of light passes through glass with minimum speed.

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Green

Yellow

Red

Violet

Maximum detail of an object can be seen by a microscope when the object is illuminated by light of.

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Longer wavelegth

Shorter wavelength

X -rays

Gama rays

The working principal of a photograph enlarger is basically the same as that of a.

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Camera

Side projection

Microsopce

Telecopse

Lenses are commonly made of.

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Glass only

Plastic only

Glass and clear plastic

Aluminium

The critical angle will be maximum when light travels from

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Glass of air

Water to air

Water to glass

Glass to water

The near point of a person is 50 cm and his far point is 200 cm The power of the lenses which his spectacles should have to see clearly distant objects will be.

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-0.5 D

-10 d

-1.5 D

-2.0 D

Lenses of what diameter are usually not practical.

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Less than 1 m

Larger than 1m

Larger than 5 m

Larger than 10 m

The index of refraction for a substance is

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Constant

Constant for a given wavelwngth

Variable with the speed of light

Never constant

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

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

Image formed by a camera is

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Real, inverted, and diminished

Virtual, upright and diminished

Virtual, upright and magnified

Real, inverted and magnified

Light rays after passing through is concave lens.

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Bend away from principal axis

Bend towards principal axis

Remain undeviated

Travel parallel to the principal axis

The object of a telescope is very large this is to have an image which is.

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More magnified

Of better resolution

More bright

More clear

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