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Class 8 > Light

Explore popular questions from Light for Class 8. This collection covers Light previous year Class 8 questions hand picked by experienced teachers.

Q 1.

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A smooth shining surface,which rebounds the light back in same or in different direction is called

a mirror

B

a lens

C

reflection of light

D

point of incidence

Q 2.

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Beam of light striking the reflecting surface is called

A

reflecting ray

incident ray

C

refracted ray

D

normal ray

Q 3.

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Band of seven colours is called

A

VIBGYOR

spectrum

C

dispersion

D

reflection

Q 4.

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Front bulged part of the eyeball is called

cornea

B

choroid

C

pupil

D

retina

Q 5.

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Image formed by mirrors are

A

real only

B

virtual only

both real and virtual

D

neither real nor virtual

Q 6.

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In case of reflection of light, the angle of incidence (i) and the angle of reflection (r) are related as

i = r

B

i < r

C

i > r

D

no definite relation

Q 7.

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Name the type of mirror used as a back view mirror.

A

Plane mirror

B

Concave mirror

Convex mirror

D

Any of these

Q 8.

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Visually impaired people can read and write using

A

electronic writer

B

digital pens

braille system

D

hearing aids

Q 9.

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The image formed by a camera and a simple microscope are respectively

A

real and real

real and virtual

C

virtual and virtual

D

virtual and real

Q 10.

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What is the angle of incidence of a ray if the reflected ray is at an angle of 90° to the incident ray ?

A

60°

45°

C

90°

D

180°

Q 11.

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The splitting of white tight into its seven constituent colours is called

A

refraction

dispersion

C

deviation

D

reflection

Q 12.

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The defect due to which a person is not able to see the distant objects clearly :

Myopia

B

Hypermetropia

C

Cornea

D

Cataract

Q 13.

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The amount of light entering the eye is controlled by

A

eye lens

B

cornea

iris

D

ciliary muscle

Q 14.

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Myopia can be corrected by using a

concave lens

B

convex lens

C

opaque lens

D

micro lens

Q 15.

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Light enters the eye through

A

eye lens

B

pupil

cornea

D

retina

Q 16.

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Light causes the sensation of

Vision

B

Light

C

Both (A) and (B)

D

None

Q 17.

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When a part of the incident light is returned back into the same medium, it is called :

A

Refraction

Reflection

C

Both

D

Absorption

Q 18.

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The branch of physics where light and its phenomena are studied is called :

Optics

B

Acoustics

C

Mechanics

D

None

Q 19.

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Light is

an electromagnetic radiation

B

a longitudinal wave

C

massless

D

all of the above

Q 20.

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Which of the followingis a natural luminous source of light ?

Sunlight

B

Wood

C

Electric lamp

D

Torch light

Q 21.

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Which of the following is not a translucent object ?

A

Greased paper

B

Paraffin wax

C

Froasted glass

Water

Q 22.

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Light shows :

A

Random propagation

B

Curvilinear propagation

Rectilinear propagation

D

None of these

Q 23.

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Which of the following is a reflector of light ?

A

Sun

B

Star

C

Filament

Moon

Q 24.

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Wood is an example of :

A

Translucent

B

Transparent

C

Polymer

Opaque