Human Eye and Colourful World Test

Result

Human Eye and Colourful World Test - 15

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Weekly Quiz Competition

Question 1
1 / -0

At noon the sun appears white as

A
Light is least scattered

B
All the colours of the white light are scattered away

C
Blue colour is scattered the most

D
Red colour is scattered the most

Solution

Sun is directly over head and sunlight travel relatively shorter distance causing only little of the blue and violet colours to be scattered.
Question 2
1 / -0

The clear sky appears blue, because

A
Blue light gets absorbed in the atmosphere

B
Ultraviolet radiations are absorbed in the atmosphere

C
Violet and blue lights get scattered more than lights of all other colours by the atmosphere

D
Light of all other colours is scattered more than the violet and blue colour lights by the atmosphere

Solution

The molecules in the air scatter blue light more than red light.
Question 3
1 / -0

Which of the following statements is correct?

A
A person with myopia can see distant objects clearly

B
A person with hypermetropia can see nearby objects clearly

C
A person with myopia can see nearby objects clearly

D
A person with hypermetropia cannot see distant objects clearly

Solution

Nearsightedness, or myopia is inability to see the far located objects clearly
Question 4
1 / -0

The least distance of distinct vision for a young adult with normal vision is about

A
25 m

B
2.5 cm

C
25 cm

D
2.5 m

Solution

The least distance of distinct vision for a young adult with normal vision is about 25 cm
Question 5
1 / -0

Which colour from the visible spectrum can travel the farthest?

A
Red

B
Blue

C
Green

D
Violet

Solution

Red colour from visible spectrum can travel faster because it scattered least in atmosphere
Question 6
1 / -0

The eyeball is approximately .......in shape

A
Elliptical

B
Spherical

C
Oval

D
None of the above

Solution

The eyeball is approximately Spherical in shape
Question 7
1 / -0

The term “accommodation” as applied to the eye, refers to its ability to:

A
Control the light intensity falling on the retina

B
Erect the inverted image formed on the retina

C
Vary the focal length of the lens

D
Vary the distance between the lens and retina

Solution

This process is achieved by the lens changing its shape. Accommodation is the adjustment of the optics of the eye to keep an object in focus on the retina as its distance from the eye varies. It helps a person to see both nearby & distant objects by adjusting focal length of eye lens.
Question 8
1 / -0

In human eye, image is formed

A
Behind retina

B
In front of retina

C
On retina

D
In between lens and retina

Solution

In human eye, image is formed on the retina with light rays converging most at the cornea and upon entering and exiting the lens. Rays from the top and bottom of the object are traced and produce an inverted real image on the retina. The distance to the object is drawn smaller than scale.
Question 9
1 / -0

The human eye can focus objects at different distances by adjusting the focal length of the eye-lens. This is due to:

A
Presbyopia

B
Accommodation

C
Near-sightedness

D
Far-sightedness

Solution

Explanation:

The human eye can focus objects at different distances by adjusting the focal length of the eye-lens. This is due to accommodation
Question 10
1 / -0

The image formed by retina of human eye is

A
Virtual and erect

B
Real and inverted

C
Virtual and inverted

D
Real and erect

Solution

The retina is a thin layer of tissue that lines the back of the eye on the inside. It is located near the optic nerve. Retina Seen that the image is formed by actual light rays and thus can form a visible image on a screen placed at the position of the image. Producing a real image each region of the detector or retina indicates the light produced by a corresponding region of the object

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Re-Attempt Weekly Quiz Competition

Human Eye and Colourful World Test - 15

Result

Human Eye and Colourful World Test - 15

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SHARING IS CARING

Question 1

Light is least scattered

All the colours of the white light are scattered away

Blue colour is scattered the most

Red colour is scattered the most

Solution

Question 2

Blue light gets absorbed in the atmosphere

Ultraviolet radiations are absorbed in the atmosphere

Violet and blue lights get scattered more than lights of all other colours by the atmosphere

Light of all other colours is scattered more than the violet and blue colour lights by the atmosphere

Solution

Question 3

A person with myopia can see distant objects clearly

A person with hypermetropia can see nearby objects clearly

A person with myopia can see nearby objects clearly

A person with hypermetropia cannot see distant objects clearly

Solution

Question 4

25 m

2.5 cm

25 cm

2.5 m

Solution

Question 5

Red

Blue

Green

Violet

Solution

Question 6

Elliptical

Spherical

Oval

None of the above

Solution

Question 7

Control the light intensity falling on the retina

Erect the inverted image formed on the retina

Vary the focal length of the lens

Vary the distance between the lens and retina

Solution

Question 8

Behind retina

In front of retina

On retina

In between lens and retina

Solution

Question 9

Presbyopia

Accommodation

Near-sightedness

Far-sightedness

Solution

Question 10

Virtual and erect

Real and inverted

Virtual and inverted

Real and erect

Solution

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