Human Eye and Colorful World Quiz

Question 1

The muscular diaphragm that controls the size of the pupil is

Accepted Answer

iris

Answer

cornea

Answer

ciliary muscles

Answer

retina

Question 2

The blue color of the sky is due to:

Accepted Answer

scattering of light

Answer

refraction of light

Answer

dispersion of light

Answer

diffraction of light

Question 3

Having two eyes facilitates in
A: Increasing the field of view
B: Bringing a three-dimensional view
C: Developing the concept of distance/ size
Then the correct option is/are

Accepted Answer

A, B, and C

Answer

A only

Answer

A and B only

Answer

B only

Question 4

Due to the atmospheric refraction of sunlight, the time from sunrise to sunset is lengthened by about:

Accepted Answer

4 minutes

Answer

6 minutes

Answer

2 minutes

Answer

5 minutes

Question 5

The atmospheric refraction of light causes the twinkling of:

Accepted Answer

stars only

Answer

planets only

Answer

planets and stars

Answer

stars and satellites

Question 6

The black opening between the aqueous humor and the lens is called

Accepted Answer

pupil

Answer

retina

Answer

iris

Answer

cornea

Question 7

Near and far points of a young person normal eye respectively are

Accepted Answer

25 cm and infinity

Answer

0 and infinity

Answer

0 and 25 cm

Answer

25 cm and 150 cm.

Question 8

The twinkling of stars is due to the atmosphere:

Accepted Answer

refraction of light

Answer

reflection of light

Answer

dispersion of light

Answer

interference of light

Question 9

Which of the following color of white light has the maximum wavelength?

Accepted Answer

red

Answer

orange

Answer

violet

Answer

blue

Question 10

The defect of vision in which the person is able to see a distant objects distinctly but cannot see nearby objects clearly is called

Accepted Answer

All above

Answer

Long-sightedness

Answer

Far-sightedness

Answer

Hypermetropia

Question 11

Myopia and hypermetropia can be corrected by

Accepted Answer

Concave and convex lens

Answer

Concave and a plano-convex lens

Answer

Convex and concave lens

Answer

Plano-concave lens for both defects.

Question 12

Which of the following color of white light has the least wavelength?

Accepted Answer

blue

Answer

red

Answer

orange

Answer

violet

Question 13

Bi-focal lenses are required to correct

Accepted Answer

presbyopia

Answer

astigmatism

Answer

coma

Answer

myopia

Question 14

The splitting up of white light into seven colors on passing through a glass prism is called:

Accepted Answer

dispersion

Answer

refraction

Answer

deflection

Answer

scattering

Question 15

The image formed on the retina of the human eye is

Accepted Answer

real and inverted

Answer

virtual and inverted

Answer

real and erect

Answer

virtual and erect

Question 16

The animals of prey have:

Accepted Answer

two eyes on the sides

Answer

two eyes at the front

Answer

two eyes at the back

Answer

one eye at the front and one on the side

Question 17

When white light enters a prism, it gets split into its constituent colors. This is due to

Accepted Answer

different refractive indexes for the different wavelengths of each color

Answer

each color has the same velocity in the prism.

Answer

prism material has a high density.

Answer

Scattering of light

Question 18

The animals called predators to have:

Accepted Answer

both the eyes at the front

Answer

both the eyes on the sides

Answer

one eye on the side and one at the front

Answer

one eye on the front and one at the back

Question 19

Refraction of light by the earth’s atmosphere due to variation in air density is called

Accepted Answer

atmospheric refraction

Answer

atmospheric reflection

Answer

atmospheric dispersion

Answer

atmospheric scattering

Question 20

Having two eyes gives a person:

Accepted Answer

wider field of view

Answer

deeper field of view

Answer

colored field of view

Answer

rear field of view

Question 21

The deflection of light by minute particles and molecules of the atmosphere in all directions is called ____________ of light.

Accepted Answer

scattering

Answer

dispersion

Answer

interference

Answer

Tyndall effect

Question 22

With both eyes open, a person’s field of view is about:

Accepted Answer

180°

Answer

90°

Answer

150°

Answer

360°

Question 23

One cannot see through the fog, because

Accepted Answer

light is scattered by the droplets

Answer

the refractive index of the fog is very high

Answer

light suffers total reflection at droplets

Answer

fog absorbs light

Question 24

The animal which does not have eyes that look sideways is:

Accepted Answer

Lion

Answer

Horse

Answer

Chicken

Answer

Fish

Question 25

At noon the sun appears white as

Accepted Answer

light is least scattered

Answer

all the colors of the white light are scattered away

Answer

the blue color is scattered the most

Answer

the red color is scattered the most

Question 26

The twinkling of stars is due to atmospheric

Accepted Answer

refraction of light by different layers of varying refractive indices

Answer

dispersion of light by water droplets

Answer

scattering of light by dust particles

Answer

internal reflection of light by clouds.

Question 27

Perception of colors by the human eye is possible:

Accepted Answer

cone-shaped cells of the retina

Answer

at retina

Answer

by rod-shaped cells of the retina

Answer

by yellow spot.

Question 28

The danger signals installed at the top of tall buildings are red in color. These can be easily seen from a distance because among all other colors, the red light

Accepted Answer

is scattered the least by smoke or fog

Answer

is scattered the most by smoke or fog

Answer

is absorbed the most by smoke or fog

Answer

moves fastest in air

Question 29

A person uses a convex lens of focal length 20 cm in spectacles, the power of the lens will be:

Accepted Answer

+5 D

Answer

-5 D

Answer

+2 D

Answer

-2 D

Question 30

Stars appear to be twinkling because of

Accepted Answer

atmospheric refraction

Answer

reflection

Answer

Tyndall effect

Answer

spectrum

Question 31

Assertion: Concave mirrors are used as reflectors in torches, vehicle headlights, and searchlights.Reason: When an object is placed beyond the center of curvature of a concave mirror, the image formed is real and inverted.

Accepted Answer

Both A and R are true but R is not the correct explanation of A.

Answer

Both A and R are true and R is the correct explanation of A.

Answer

A is true but R is false.

Answer

A is false but R is true.

Question 32

A bifocal lens is used in

Accepted Answer

Presbyopia

Answer

myopia

Answer

lever

Answer

Cataract

Question 33

The defect of the eye in which the eyeball becomes too long is

Accepted Answer

myopia

Answer

hypermetropia

Answer

presbyopia

Answer

cataract

Question 34

A person uses a convex lens of focal length 20 cm in spectacles, the power of the lens will be:

Accepted Answer

+5 D

Answer

-5 D

Answer

+2 D

Answer

-2 D

Question 35

The splitting of light into its component colors is called

Accepted Answer

Dispersion

Answer

Spectrum

Answer

Tyndall effect

Answer

Refraction

Question 36

The crystalline lens of people at old age becomes milky and cloudy. This condition is called

Accepted Answer

cataract

Answer

myopia

Answer

lever

Answer

presbyopia

Question 37

The farthest point of a normal eye is

Accepted Answer

infinity

Answer

25 cm

Answer

50 cm

Answer

75 cm

Question 38

The amount of light entering the eye can be controlled by the

Accepted Answer

pupil

Answer

iris

Answer

cornea

Answer

ciliary muscles

Question 39

In an experiment to trace the path of a ray of light through a glass prism for different values of angle of incidence a student would find that the emergent ray:

Accepted Answer

bends at an angle to the direction of the incident ray

Answer

is parallel to the incident ray

Answer

is perpendicular to the incident ray

Answer

is parallel to the refracted ray

Question 40

Type of lens used in correction of hypermetropia

Accepted Answer

convex lens

Answer

concave lens

Answer

reflecting lens

Answer

bifocal lens

Question 41

The defect of vision in which a person cannot see the distant objects clearly but can see nearby objects clearly is called

Accepted Answer

myopia

Answer

hypermetropia

Answer

presbyopia

Answer

bifocal eye

Question 42

The medical condition in which the lens of the eye of a person becomes progressively cloudy resulting in blurred vision is called

Accepted Answer

cataract

Answer

myopia

Answer

hypermetropia

Answer

presbyopia

Question 43

Type of lens used in correction of hypermetropia

Accepted Answer

convex lens

Answer

concave lens

Answer

reflecting lens

Answer

bifocal lens

Question 44

Reason behind advance sunrise and delayed sunset

Accepted Answer

atmospheric refraction

Answer

total internal reflection

Answer

dispersion

Answer

reflection

Question 45

The splitting of white light into its component colours is called

Accepted Answer

dispersion

Answer

refraction

Answer

reflation

Answer

tyndall effect

Question 46

Which of the following is a natural phenomenon which is caused by the dispersion of sunlight in the sky?

Accepted Answer

Rainbow

Answer

Twinkling of stars

Answer

Stars seem higher than they actually are

Answer

Advanced sunrise and delayed sunset

Question 47

The splitting of white light into its component colours is called

Accepted Answer

dispersion

Answer

refraction

Answer

reflation

Answer

tyndall effect

Questions in this Quiz

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Human Eye and Colorful World Quiz

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