Question # 1

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

Eye colour is the colour of

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Iris

Retina

Comea

Pupil

A young man wearing glasses does not require bifocals because he

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Is farsighted

Has the ability to accommodate

Is short signed

Does not suffer from coma

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

For total internal reflection the light rays enter

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From rarer to denser medium

From, denser to rarer medium

Medium of same refractive index

At an angle 90 ^o

Which of the following does not produced an erect image.

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Galilean telescope

Terrestrial telescope

Prism binoculars

Astronomical telescope

The power of convex lens is 10 d. At what distance the 3 times larger image is formed.

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9.6 cm

2.3 cm

13.3 cm

17.6 cm

The image of distant object as seen through as astronomical telescope is.

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Real and inverted

Virtual and inverted

Real and erect

Virtual and erect

A pencil dipped partially into water appears bent because of.

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Reflection of water surface

Diffraction of water surface

Refraction of water surface

Water is a fluid

The refractive index of benzenes is 1.5 What is the critical angle of benzene.

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0.667 ^o

42 ^o

48^o

90^o

Which type of image is produced by the converging lens of human eye if it views a distant object.

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Real, erect, same size

Real, inverted, diminished

Virtual, erect, diminshed

Virtual, inverted, magnified

A double convex lens acts as diverging lens when the object is.

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Inside the focus

At the focus

Between F and 4 F

a 4F

The diameter of a lens is called.

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Focal length

Principal axis

Optical centre

Aperture

In compound microscope, image formed by the eyepiece is

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Real

Invented

Erect

Diminished

A lens whose thickness is small as compared to focal length is a

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Concave lens

Double concave lens

Convex lens

Plano concave lens

The normal adjustment the magnifying power of an astronomical telescope is.

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fe/fo

fo/fe

fo+ fe

fo -fe

Any transparent medium bounded by one or two spherical surfaces is called

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Prism

Lens

Plane mirror

Grating

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

A convex mirror is used to reflect light from an object placed 66 cm in front of the mirror. The focal length of the mirror is 46 cm Find the location of the image.

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23 cm

-23 cm

-27 cm

27 cm

The maximum number of rays required by a lens to form an image are

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2

3

4

Infinite

In case of a convex lens the rays closed to and parallel to the principal axis will converge after refraction by the lens at a point.

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Optical centre

Principal focus

Focal plane

Principal axis

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