Question # 1

Chromatic aberration can be removed by using.

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Convex lens

Two convex lenses

Concave lens

Combination of a convex lens and a concave lens

Which is the thick circular structure in teh eye containing an aperture with variable diameter It controls the amount of light reaching the retina.

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Retina

Iris

Pupil

Cornea

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

Power of lens is measured in

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cm

Metres

cm-1

Dioptres

The line passing symmetrically though the optical center of the lens is.

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Focal plane

Principal focus

Principal axis

Focal length

Which parameter determines the brightness of a light source sensed by an eye.

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Light energy entering the eye

Wavelength of light

Total radiant flux entering the eye

Total luminous flux entering the eye

In compound microscope image formed by the eyepiece is

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Real

Inverted

erect

diminished

A double convex an bubble in water will behave as.

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Plane slab

Concave mirror

Convex lens

Concave lens

What would be the colour of sky n the absence of atmosphere.

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Blue

Indigo

Red

Black

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

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

Which term is used for human eye deflect near sightedness.

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Myopia

Hypermetropia

Presbyopia

Calaract

To final image produced by a compound microscope is.

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Real and inverted

Real and erect

Virtual and erect

Virtual and inverted

What is true is real images formed by a converging lens.

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they are inverted

They are on the same side of the lens as the object

They can never be shown on a screen

They cannot be seen

The bending of light when it enters a medium

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Reflection

Refraction

Diffraction

Total internal reflection

What is zoom lens

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It is a lens having fixed focal length

It is a lens having variable focal length

It is a lens used in radii to telescope

All of the above

If a single convex lens is placed closed to the eye then it can be used as

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Telescope

Simple microscope

Compound microscope

Opera glass

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

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

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

The phenomenon of regular refraction of light illustrates taht.

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Light is reflected in one direction only

Light is reflected through a range of different angles

Light is refracted in one direction only

Light is refracted through a range of different angles.

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