Human Eye and Colourful World Test

Result

Human Eye and Colourful World Test - 3

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Weekly Quiz Competition

Question 1
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A prism splits a beam of white light into seven colours because different colours have different

A
phase in prism

B
Speed in prism

C
Amplitude in prism

D
Angle in prism

Solution

Prism splits a beam of white light into seven colours because different colours have different speeds due to different wavelengths.
Question 2
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The sky would appear red instead of blue, if:

A
atmospheric particles scatter red light more than blue light.

B
atmospheric particles scatter all colours equally.

C
atmospheric particles scatter blue light more than red light.

D
the sun was much hotter.

Solution

The sky would appear red instead of blue if atmospheric particles scatter red light more than blue light.
Question 3
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Which of the following is used to correct the eye defect - presbyopia?

A
Convex lens

B
Prismatic lens

C
Concave lens

D
Bi-focal lenses

Solution

Presbyopia can be corrected by using bi-focal lenses.

The upper part of a bi-focal lens consists of concave lens facilitating distant vision, and the lower part consists of convex lens facilitating nearby vision.
Question 4
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Que - Identify the correct statement: ,

Iris controls the size of the pupil.

Pupil controls the size of the iris.

The eye lens forms an inverted real image of the object.

Pupil controls the amount of light entering the eye.

A
(1), (3) and (4)

B
(1) and (4)

C
(3) and (4)

D
(2), (3) and (4)

Solution

Iris controls the size of the pupil.The eye lens forms an inverted real image of the object.
Pupil regulates and controls the amount of light entering the eye.
Question 5
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An optician used concave lens to correct the defect of eye so that the customer can see clearly. Which defect of vision could it be?

A
Conjunctivitis

B
Far sightedness

C
Cataract

D
Near sightedness

Solution

The customer is suffering from Myopia (Near sightedness) which is corrected using concave lens.
Question 6
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By how much time is the sunset delayed due to atmospheric refraction?

A
5 minutes

B
2 hours

C
20 minutes

D
2 minutes

Solution

We can see the sun 2 minutes after the actual sunset because of atmospheric refraction.
Question 7
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A person is suffering from both defects of vision - myopia and hypermetropia. Which type of lens should he use?

A
Bi-focal lens

B
Concave lens

C
Plane lens

D
Convex lens

Solution

Sometimes, a person may suffer from both myopia and hypermetropia. Such people require a bi-focal lens.
Question 8
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The phenomenon of splitting of white light into its constituent seven colours on passing through a glass prism is known as

A
scattering of light

B
tyndall effect

C
refraction of light

D
dispersion of light

Solution

The phenomenon of splitting of white light into its constituent seven colours on passing through a glass prism is called dispersion of light.
Question 9
1 / -0

One cannot see through fog because :

A
light suffers total internal reflection at the droplets of fog.

B
fog absorbs light.

C
light is scattered by the droplets of fog.

D
the refractive index of fog is infinity.

Solution

One cannot see through fog because light is scattered in every direction by the droplets of fog.
Question 10
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Which of the following ways is used to correct the eye defect - myopia?

A
Cylindrical lens

B
Concave lens

C
Any of the two lens

D
Convex lens

Solution

In myopic eye, the image is formed before retina and concave lens diverges the rays, and hence the image is formed on the retina.

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Re-Attempt Weekly Quiz Competition

Human Eye and Colourful World Test - 3

Result

Human Eye and Colourful World Test - 3

Score

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Rank

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SHARING IS CARING

Question 1

phase in prism

Speed in prism

Amplitude in prism

Angle in prism

Solution

Question 2

atmospheric particles scatter red light more than blue light.

atmospheric particles scatter all colours equally.

atmospheric particles scatter blue light more than red light.

the sun was much hotter.

Solution

Question 3

Convex lens

Prismatic lens

Concave lens

Bi-focal lenses

Solution

Question 4

(1), (3) and (4)

(1) and (4)

(3) and (4)

(2), (3) and (4)

Solution

Question 5

Conjunctivitis

Far sightedness

Cataract

Near sightedness

Solution

Question 6

5 minutes

2 hours

20 minutes

2 minutes

Solution

Question 7

Bi-focal lens

Concave lens

Plane lens

Convex lens

Solution

Question 8

scattering of light

tyndall effect

refraction of light

dispersion of light

Solution

Question 9

light suffers total internal reflection at the droplets of fog.

fog absorbs light.

light is scattered by the droplets of fog.

the refractive index of fog is infinity.

Solution

Question 10

Cylindrical lens

Concave lens

Any of the two lens

Convex lens

Solution

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