Quiz about The Human Eye and the Colourful World_LS_2

Question 1

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 2

WHAT IS THE NEAR POINT OF THE EYE ?

Accepted Answer

25 CM

Answer

15 CM

Answer

20 CM

Answer

30 CM

Question 3

Why is a normal eye not able to see clearly the objects placed closer than 25 cm? What is the first statement of the audio clip?

Accepted Answer

The normal eye is not able to see clearly objects placed closer than 25 cm

Answer

because all the power of accommodation of the eye is exhausted at a distance of 25 cm.

Answer

The maximum accomodation of the eye is reached when the object is placed at 25 cm fro the eye.

Answer

After this the ciliary muscles cannot make the eye-lens more thick.

Question 4

Why is a normal eye not able to see clearly the objects placed closer than 25 cm? What is the first statement of the audio clip?

Accepted Answer

The normal eye is not able to see clearly objects placed closer than 25 cm

Answer

because all the power of accommodation of the eye is exhausted at a distance of 25 cm.

Answer

The maximum accomodation of the eye is reached when the object is placed at 25 cm fro the eye.

Answer

After this the ciliary muscles cannot make the eye-lens more thick.

Question 5

Why is a normal eye not able to see clearly the objects placed closer than 25 cm? What is the first statement of the audio clip?

Accepted Answer

The normal eye is not able to see clearly objects placed closer than 25 cm

Answer

because all the power of accommodation of the eye is exhausted at a distance of 25 cm.

Answer

The maximum accomodation of the eye is reached when the object is placed at 25 cm fro the eye.

Answer

After this the ciliary muscles cannot make the eye-lens more thick.

Question 6

Why is a normal eye not able to see clearly the objects placed closer than 25 cm? What is the second statement of the audio clip?

Accepted Answer

because all the power of accommodation of the eye is exhausted at a distance of 25 cm.

Answer

The normal eye is not able to see clearly objects placed closer than 25 cm

Answer

The maximum accomodation of the eye is reached when the object is placed at 25 cm fro the eye.

Answer

After this the ciliary muscles cannot make the eye-lens more thick.

Question 7

Why is a normal eye not able to see clearly the objects placed closer than 25 cm? What is the third statement of the audio clip?

Accepted Answer

The maximum accomodation of the eye is reached when the object is placed at 25 cm fro the eye.

Answer

The normal eye is not able to see clearly objects placed closer than 25 cm

Answer

because all the power of accommodation of the eye is exhausted at a distance of 25 cm.

Answer

After this the ciliary muscles cannot make the eye-lens more thick.

Question 8

Why is a normal eye not able to see clearly the objects placed closer than 25 cm? What is the fourth statement of the audio clip?

Accepted Answer

After this the ciliary muscles cannot make the eye-lens more thick.

Answer

The normal eye is not able to see clearly objects placed closer than 25 cm

Answer

because all the power of accommodation of the eye is exhausted at a distance of 25 cm.

Answer

The maximum accomodation of the eye is reached when the object is placed at 25 cm fro the eye.

Question 9

What changes take place in the shape of eye-lens :

(a) when the eye is focused on a near object?

Accepted Answer

Eye-lens becomes thicker.

Answer

Eye-lens become thinner.

Question 10

What changes take place in the shape of eye-lens :

(b) when the eye is focused on a distant object ?

Accepted Answer

Eye-lens become thinner.

Answer

Eye-lens becomes thicker.

Question 11

The eyes of a person are focused

on a nearby object, and

on a distant object, turn by turn. In which case :

(a) the focal length of eye-lens will be the maximum ?

Accepted Answer

When the eye is focused on a distant object.

Answer

When the eye is focused on a nearby object.

Question 12

The eyes of a person are focused

on a nearby object, and

on a distant object, turn by turn. In which case :

(b) the converging power of eye-lens will be the maximum ?

Accepted Answer

When the eye is focused on a nearby object.

Answer

When the eye is focused on a distant object.

Question 13

What change is made in the eye to enable it to focus on objects situated at different distances? Illustrate your answer with the help of diagrams. What is the first statement of the audio clip?

Accepted Answer

To focus on distant objects, the ciliary muscles of the eye get fully relaxed and pull the suspensory ligaments attached to the eye-lens tightly.

Answer

This, in turn, stretches the eye-lens and the eye-lens becomes thin.

Answer

To focus on nearby objects, the ciliary muscles of the eyes contract and make the suspensory ligaments loose.

Answer

The ligaments then stop pulling the eye-lens. The eye-lens bulges under its own elasticity and becomes thick.

Question 14

What change is made in the eye to enable it to focus on objects situated at different distances? Illustrate your answer with the help of diagrams. What is the second statement of the audio clip?

Accepted Answer

This, in turn, stretches the eye-lens and the eye-lens becomes thin.

Answer

To focus on distant objects, the ciliary muscles of the eye get fully relaxed and pull the suspensory ligaments attached to the eye-lens tightly.

Answer

To focus on nearby objects, the ciliary muscles of the eyes contract and make the suspensory ligaments loose.

Answer

The ligaments then stop pulling the eye-lens. The eye-lens bulges under its own elasticity and becomes thick.

Question 15

What change is made in the eye to enable it to focus on objects situated at different distances? Illustrate your answer with the help of diagrams. What is the third statement of the audio clip?

Accepted Answer

To focus on nearby objects, the ciliary muscles of the eyes contract and make the suspensory ligaments loose.

Answer

To focus on distant objects, the ciliary muscles of the eye get fully relaxed and pull the suspensory ligaments attached to the eye-lens tightly.

Answer

This, in turn, stretches the eye-lens and the eye-lens becomes thin.

Answer

The ligaments then stop pulling the eye-lens. The eye-lens bulges under its own elasticity and becomes thick.

Question 16

What change is made in the eye to enable it to focus on objects situated at different distances? Illustrate your answer with the help of diagrams. What is the fourth statement of the audio clip?

Accepted Answer

The ligaments then stop pulling the eye-lens. The eye-lens bulges under its own elasticity and becomes thick.

Answer

To focus on distant objects, the ciliary muscles of the eye get fully relaxed and pull the suspensory ligaments attached to the eye-lens tightly.

Answer

This, in turn, stretches the eye-lens and the eye-lens becomes thin.

Answer

To focus on nearby objects, the ciliary muscles of the eyes contract and make the suspensory ligaments loose.

Question 17

How is the amount of light entering the eye controlled ? What is the first statement of the audio clip?

Accepted Answer

The amount of light entering the eye is controlled by the iris.

Answer

It automatically adjusts the size of the pupil according to the intensity of light received by the eye.

Answer

If the amount of light received by the eye is large, then the iris contracts the pupil and reduces the amount of light entering the eye.

Answer

If the amount of light received by the eye is small, then the iris expands the pupil so that more light may enter the eye.

Question 18

How is the amount of light entering the eye controlled ? What is the second statement of the audio clip?

Accepted Answer

It automatically adjusts the size of the pupil according to the intensity of light received by the eye.

Answer

The amount of light entering the eye is controlled by the iris.

Answer

If the amount of light received by the eye is large, then the iris contracts the pupil and reduces the amount of light entering the eye.

Answer

If the amount of light received by the eye is small, then the iris expands the pupil so that more light may enter the eye.

Question 19

How is the amount of light entering the eye controlled? What is the third statement of the audio clip?

Accepted Answer

If the amount of light received by the eye is large, then the iris contracts the pupil and reduces the amount of light entering the eye.

Answer

The amount of light entering the eye is controlled by the iris.

Answer

It automatically adjusts the size of the pupil according to the intensity of light received by the eye.

Answer

If the amount of light received by the eye is small, then the iris expands the pupil so that more light may enter the eye.

Question 20

How is the amount of light entering the eye controlled? What is the fourth statement of the audio clip?

Accepted Answer

If the amount of light received by the eye is small, then the iris expands the pupil so that more light may enter the eye.

Answer

The amount of light entering the eye is controlled by the iris.

Answer

It automatically adjusts the size of the pupil according to the intensity of light received by the eye.

Answer

If the amount of light received by the eye is large, then the iris contracts the pupil and reduces the amount of light entering the eye.

Question 21

What happens to the eye when you enter a darkened cinema hall from bright sunshine ? Give reason for your answer. What is the first statement of the audio clip?

Accepted Answer

When we enter a darkened cinema hall from bright sunshine, at first we cannot see anything clearly.

Answer

After a short time our vision improves.

Answer

This is because in bright sunshine the pupil of our eye is small

Answer

and when we just enter the darkened room very little light enters our eye due to which we cannot see properly.

Answer

After a while, when the pupil of our eye expands, more light enters our eye and we can see clearly.

Question 22

What happens to the eye when you enter a darkened cinema hall from bright sunshine? Give a reason for your answer. What is the second statement of the audio clip?

Accepted Answer

After a short time our vision improves.

Answer

When we enter a darkened cinema hall from bright sunshine, at first we cannot see anything clearly.

Answer

This is because in bright sunshine the pupil of our eye is small

Answer

and when we just enter the darkened room very little light enters our eye due to which we cannot see properly.

Answer

After a while, when the pupil of our eye expands, more light enters our eye and we can see clearly.

Question 23

What happens to the eye when you enter a darkened cinema hall from bright sunshine? Give a reason for your answer. What is the third statement of the audio clip?

Accepted Answer

This is because in bright sunshine the pupil of our eye is small

Answer

When we enter a darkened cinema hall from bright sunshine, at first we cannot see anything clearly.

Answer

After a short time our vision improves.

Answer

and when we just enter the darkened room very little light enters our eye due to which we cannot see properly.

Answer

After a while, when the pupil of our eye expands, more light enters our eye and we can see clearly.

Question 24

What happens to the eye when you enter a darkened cinema hall from bright sunshine? Give a reason for your answer. What is the fourth statement of the audio clip?

Accepted Answer

and when we just enter the darkened room very little light enters our eye due to which we cannot see properly.

Answer

When we enter a darkened cinema hall from bright sunshine, at first we cannot see anything clearly.

Answer

After a short time our vision improves.

Answer

This is because in bright sunshine the pupil of our eye is small

Answer

After a while, when the pupil of our eye expands, more light enters our eye and we can see clearly.

Question 25

What happens to the eye when you enter a darkened cinema hall from bright sunshine? Give a reason for your answer. What is the fifth statement of the audio clip?

Accepted Answer

After a while, when the pupil of our eye expands, more light enters our eye and we can see clearly.

Answer

When we enter a darkened cinema hall from bright sunshine, at first we cannot see anything clearly.

Answer

After a short time our vision improves.

Answer

This is because in bright sunshine the pupil of our eye is small

Answer

and when we just enter the darkened room very little light enters our eye due to which we cannot see properly.

Question 26

Why does it take some time to see objects in a dim room when you enter the room from the bright sunshine outside? What is the first statement of the audio clip?

Accepted Answer

It takes some time to see objects in a dim room when we enter the room from bright sunshine outside

Answer

because it takes some time to the small pupil of our eye to become large

Answer

so that more light enters our eye and we can see clearly.

Question 27

Why does it take some time to see objects in a dim room when you enter the room from the bright sunshine outside? What is the second statement of the audio clip?

Accepted Answer

because it takes some time to the small pupil of our eye to become large

Answer

It takes some time to see objects in a dim room when we enter the room from bright sunshine outside

Answer

so that more light enters our eye and we can see clearly.

Question 28

Why does it take some time to see objects in a dim room when you enter the room from the bright sunshine outside? What is the third statement of the audio clip?

Accepted Answer

so that more light enters our eye and we can see clearly.

Answer

It takes some time to see objects in a dim room when we enter the room from bright sunshine outside

Answer

because it takes some time to the small pupil of our eye to become large

Question 29

A person walking in a dark corridor enters into a brightly lit room :

(a) State the effect on the pupil of the eye.

Accepted Answer

Pupil becomes smaller.

Answer

The amount of light entering the eye is reduced.

Question 30

A person walking in a dark corridor enters into a brightly lit room :

(b) The amount of light entering the eye is reduced.

Accepted Answer

The amount of light entering the eye is reduced.

Answer

Pupil becomes smaller.

Question 31

Ciliary muscles of human eye can contract or relax. How does it help in the normal functioning of the eye ? What is the second statement of the audio clip?

Accepted Answer

and these muscles contract and make the eye-lens thick when the eye is looking at a nearby object.

Answer

Ciliary muscles get relaxed and the eye lens becomes thin when the eye is looking at a distant object,

Answer

Thus, ciliary muscles help in the normal functioning of the eye by changing the thickness of the eye-lens while focussing.

Question 32

Ciliary muscles of human eye can contract or relax. How does it help in the normal functioning of the eye ? What is the third statement of the audio clip?

Accepted Answer

Thus, ciliary muscles help in the normal functioning of the eye by changing the thickness of the eye-lens while focussing.

Answer

Ciliary muscles get relaxed and the eye lens becomes thin when the eye is looking at a distant object,

Answer

and these muscles contract and make the eye-lens thick when the eye is looking at a nearby object.

Question 33

Describe and explain, how a normal eye can see objects lying at various distances clearly. What is the first statement of the audio clip?

Accepted Answer

To focus on distant objects, the ciliary muscles of the eye get fully relaxed

Answer

and pull the suspensory ligaments attached to the eye-lens tightly.

Answer

This, in turn, stretches the eye-lens and the eye-lens becomes thin.

Answer

This thin eye-lens has large focal length and small converging power

Answer

sufficient to converge the parallel rays of light coming from a distant object to form an image on the retina.

Question 34

Describe and explain, how a normal eye can see objects lying at various distances clearly. What is the second statement of the audio clip?

Accepted Answer

and pull the suspensory ligaments attached to the eye-lens tightly.

Answer

To focus on distant objects, the ciliary muscles of the eye get fully relaxed

Answer

This, in turn, stretches the eye-lens and the eye-lens becomes thin.

Answer

This thin eye-lens has large focal length and small converging power

Answer

sufficient to converge the parallel rays of light coming from a distant object to form an image on the retina.

Question 35

Describe and explain, how a normal eye can see objects lying at various distances clearly. What is the third statement of the audio clip?

Accepted Answer

This, in turn, stretches the eye-lens and the eye-lens becomes thin.

Answer

To focus on distant objects, the ciliary muscles of the eye get fully relaxed

Answer

and pull the suspensory ligaments attached to the eye-lens tightly.

Answer

This thin eye-lens has large focal length and small converging power

Answer

sufficient to converge the parallel rays of light coming from a distant object to form an image on the retina.

Question 36

Describe and explain, how a normal eye can see objects lying at various distances clearly. What is the fourth statement of the audio clip?

Accepted Answer

This thin eye-lens has large focal length and small converging power

Answer

To focus on distant objects, the ciliary muscles of the eye get fully relaxed

Answer

and pull the suspensory ligaments attached to the eye-lens tightly.

Answer

This, in turn, stretches the eye-lens and the eye-lens becomes thin.

Answer

sufficient to converge the parallel rays of light coming from a distant object to form an image on the retina.

Question 37

Describe and explain, how a normal eye can see objects lying at various distances clearly. What is the fifth statement of the audio clip?

Accepted Answer

sufficient to converge the parallel rays of light coming from a distant object to form an image on the retina.

Answer

To focus on distant objects, the ciliary muscles of the eye get fully relaxed

Answer

and pull the suspensory ligaments attached to the eye-lens tightly.

Answer

This, in turn, stretches the eye-lens and the eye-lens becomes thin.

Answer

This thin eye-lens has large focal length and small converging power

Question 38

Describe and explain, how a normal eye can see objects lying at various distances clearly. What is the sixth statement of the audio clip?

Accepted Answer

To focus on nearby objects, the ciliary muscles of the eyes contract and make the suspensory ligaments loose.

Answer

The ligaments then stop pulling the eye-lens.

Answer

The eye-lens bulges under its own elasticity and becomes thick.

Answer

This thick eye-lens has small focal length and large converging power

Answer

which converges the diverging rays coming from the nearby object to form an image on the retina.

Question 39

Describe and explain, how a normal eye can see objects lying at various distances clearly. What is the seventh statement of the audio clip?

Accepted Answer

The ligaments then stop pulling the eye-lens.

Answer

To focus on nearby objects, the ciliary muscles of the eyes contract and make the suspensory ligaments loose.

Answer

The eye-lens bulges under its own elasticity and becomes thick.

Answer

This thick eye-lens has small focal length and large converging power

Answer

which converges the diverging rays coming from the nearby object to form an image on the retina.

Question 40

Describe and explain, how a normal eye can see objects lying at various distances clearly. What is the eighth statement of the audio clip?

Accepted Answer

The eye-lens bulges under its own elasticity and becomes thick.

Answer

To focus on nearby objects, the ciliary muscles of the eyes contract and make the suspensory ligaments loose.

Answer

The ligaments then stop pulling the eye-lens.

Answer

This thick eye-lens has small focal length and large converging power

Answer

which converges the diverging rays coming from the nearby object to form an image on the retina.

Question 41

Describe and explain, how a normal eye can see objects lying at various distances clearly. What is the ninth statement of the audio clip?

Accepted Answer

This thick eye-lens has small focal length and large converging power

Answer

To focus on nearby objects, the ciliary muscles of the eyes contract and make the suspensory ligaments loose.

Answer

The ligaments then stop pulling the eye-lens.

Answer

The eye-lens bulges under its own elasticity and becomes thick.

Answer

which converges the diverging rays coming from the nearby object to form an image on the retina.

Question 42

Describe and explain, how a normal eye can see objects lying at various distances clearly. What is the tenth statement of the audio clip?

Accepted Answer

which converges the diverging rays coming from the nearby object to form an image on the retina.

Answer

To focus on nearby objects, the ciliary muscles of the eyes contract and make the suspensory ligaments loose.

Answer

The ligaments then stop pulling the eye-lens.

Answer

The eye-lens bulges under its own elasticity and becomes thick.

Answer

This thick eye-lens has small focal length and large converging power

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