The image of an object at an infinite distance is obtained in a real and erect form through a convex magnifying glass. - Science and Technology 1

Advertisements
Advertisements
MCQ
True or False

The image of an object at an infinite distance is obtained in a real and erect form through a convex magnifying glass.

Options

  • Right

  • Wrong

Advertisements

Solution

The image of an object at an infinite distance is obtained in a real and erect form through a convex magnifying glass- Wrong

  Is there an error in this question or solution?
Chapter 7: Lenses - Right or Wrong sentence

RELATED QUESTIONS

Write the function of the following part of the human eye: Cornea


Compare the following: Choroid and retina


Draw labelled diagrams of the following: Eye


Write short notes on the following: Retina 


Answer briefly:

How do you perceive the colour of an object?


How does the eye regulate the amount of light that falls on the retina?


How does the eye regulate the amount of light that falls on the retina?


Differentiate between: Rods and cones


The region of the vertebrate eye, where the optic nerve passes out of the retina, is called the

(a) fovea

(b) iris

(c) blind spot

(d) optic chaisma


Distinguish between: blind spot and yellow spot


Which. of the following has normal vision?

(a) Xc Xc
(b) Xc Y
(c) XC Xc
(d) Xc Yc


Myopia is an example of ______.


Fill in the blanks in the following.

The size of the pupil becomes ________ when you see in dim light.


Fill in the blanks in the following.

Night birds have _________ cones than rods in their eyes.

 


Draw a labelled sketch of the human eye.


Explain why the image distance in the eye does not change when we change the distance of an object from the eye? 


Describe the anatomy of the human eye.


Explain the mechanism of vision.


Draw a neat and labelled diagram of the structure of the human eye


Match the following:

Column I Column II
(i) Myopia (a) Converging power of eye lens becomes low
(ii) Hypermetropia (b) Converging power of eye lens remains the same
  (c) Converging power of eye lens becomes high

What changes the shape of lens in the eye?


Fill in the following blank with suitable word:  

Most of the refraction of light rays entering the eye occurs at the outer surface of the.............   


Fill in the following blank with suitable word: 

The part of eye which alters the size of the pupil is............   


Fill in the following blank with suitable word: 

The iris controls the amount of................entering the eye.  


The size of the pupil of the eye is adjusted by:
(a) cornea
(b) ciliary muscles
(c) optic nerve
(d) iris


Fill in the following blank with suitable word: 

 Having two eyes gives a ................field of view.


The region in the eyes where the rods and cones are located is the


In what two ways is the yellow spot different from the blind spot?


Sometimes you remember a vivid picture of a dream you saw. What is the role of your eyes in this experience?


Give scientific reason:
One can sense colours only in bright light.


Give scientific reason:

We cannot clearly see an object kept at a distance less than 25 cm from the eye.


What is the function of iris and the muscles connected to the lens in human eye?


State the main functions of the following: 
 Coronary Artery  


Define the following:
Power of accommodation


Write whether the following is true or false:
Rods are the receptor cells in the retina of the eye sensitive to dimlight.


Choose the correct answer.
Colour is detected by ____________


Answer the following question.
Trace the sequence of events Whichoccur when a bright light is focused on your eyes.


What are the functions of tears?


Name the following:
The pigmented circular area seen in the eye.


Name the following:
The area where the image is formed but not seen by our eye is termed as.


Give Technical Term:
The cells of the retina that are sensitive to colour.


Give Technical Term:
The adjustment of the eye in order to obtain a clear vision of objects at different distances


Mention, if the following statement is True or False
Rods are responsible for vision in the dark


Mention, if the following statement is True or False
The least distance of distinct vision for the human eye is 25 cm


State the Function:
Cornea


Complete the following sentence with appropriate Word
The photoreceptor cells of the retina sensitive to colour are:


Long answer question

Draw the neat labelled diagram of the Sectional view of the human eye.


For the normal human eye, the near point is at ___________ cm.


Draw a scientifically correct labelled diagram of a human eye and answer the questions based on it:

  1. Name the type of lens in the human eye.
  2. Name the screen at which the maximum amount of incident light is refracted?
  3. State the nature of the image formed of the object on the screen inside the eye.

A small hole of changing diameter at the centre of Iris is called _______.


For a normal human eye the near point is at _______.


In a relaxed state, the focal length of healthy eyes is _______.


Write the name.

The part of human eye that transmits electrical signals to the brain.


Write the name.

The ability of lens to adjust the focal length as per need is


Write the name.

The fleshy screen behind cornea.


Write the name.

The screen with light sensitive cells in human eye.


The image of the object in the human eye is formed on the cross screen.


For a healthy human eye, the distant point is infinite distance.


Write an Explanation.

Minimum distance of distinct vision


Write an Explanation.

Farthest distance of distinct vision


Write an Explanation.

Power of accommodation


Write scientific reason.

The movie cannot be enjoyed if seat of a viewer is too close to the screen in the cinema.


The following figure show the change in the shape of the lens while seeing distant and nearby objects. Complete the figures by correctly labelling the diagram.


The following figure show the change in the shape of the lens while seeing distant and nearby objects. Complete the figures by correctly labelling the diagram.


Write the function of the human eye and label parts of the figure given below.


Complete the paragraph by choosing the right options given below.

(minimum, near point, 25 cm, farthest, farthest distance, far point)

The _______ distance of an object from a normal eye, at which it is clearly visible without stress on the eye, is called the minimum distance of distinct vision. The position of the object at this distance is called the _______ of the eye, for a normal human eye, the near point is at _______. The _______ distance of an object from a human eye, at which it is clearly visible without stress on the eye is called _______ of distinct vision. The position of the object at this distance is called the _______ of the eye.


______ is tough and thick white sheath that protects the inner parts of the eye.


______ is the structural and functional unit of living organisms.


The larynx has fold of tissue which vibrate with the passage of air to produce sound.


Why the human eye is compared with camera?


Draw the struture of human eye and label its parts.


Shylesh is a school-going kid studying standard VIII. He is crazy about playing video games on mobile phones. After a couple of months, his eyes turned red and he felt severe pain in his eyes. His science teacher enquired about this and advised his parents to take him to an eye doctor.

  1. How does excessive usage of mobile phone affect our eyes?
  2. What are the values shown by the teacher?

In a myopic eye, the image of the object is formed


From where the following nerves arise.

Optic nerve


A tiny mirror M is fixed on a piece of cardboard placed on a table. The cardboard is illuminated by light from a bulb. The position of eye with respect to position of bulb is shown in the figure as A, B, C and D. In which position mirror will be visible?

(A) (B)  (C) (D)

Which of the following statements is correct regarding rods and cones in the human eye?


In the figure of the human eye, the cornea is represented by the letter


Name the part of the eye which gives colour to the eyes.


Eyes of the nocturnal birds have large cornea and a large pupil. How does this structure help them?


Which part of the eye gets affected if someone is suffering from cataract? How is it treated?


Write down the names of parts of the eye in the blank spaces shown in the figure.


______ is a transparent layer.


Match the following

1. Conjunctiva a. Coloured part of eye
2. Cornea b. Photosensitive layer
3. Iris c. Refraction
4. Retina d. Protection

Describe the parts in the external structure of the eye.


Which one of the following statements is NOT correct? 


Select the option with incorrect identification:


Which cells of the retina enable us to see coloured objects around us?


The innermost layer of human eye is ______.


In human eye the part which allows light to enter into the eye is ______.


Match the following:

Column - I Column - II
1. Retina a) Path way of light
2. Pupil b) Far point comes closer
3. Ciliary muscles c) near point moves away
4. Myopia d) Screen of the eye
5. Hypermetropia e) Power of accommodation

Match the following:

Column - I Column - II
1. Retina a. Path way of light
2. Pupil b. Far point comes closer
3. Ciliary muscles c. near point moves away
4. Myopia d. Screen of the eye
5. Hypermetropia e. Power of accommodation

Match the following:

Column - I Column - II
1

Retina 

a Pathway of light
2 Pupil b

Far point comes closer

3 Ciliary muscles c

near point moves away

4 Myopia d Screen of the eye
5 Hypermetropia f Power of accommodation

With reference to human eye, answer the following question.

What is aqueous humor?


With reference to human eye, answer the following question.

What is blind spot?


With neat, labeled diagram describe the structure of retina of eye.


Vitreous humour is present between ______.


Match the following:

Column - I Column - II
1. Retina a. Pathway of light
2. Pupil b. Far point comes closer
3. Ciliary muscles c. near point moves away
4. Myopia d. Screen of the eye
5. Hypermetropia f. Power of accommodation

Match the following:

  Column - I   Column - II
1 Retina a  pathway of light
2 Pupil b

far point comes closer

3 Ciliary muscles c

near point moves away

4 Myopia d screen of the eye
5 Hypermetropia e power of accommodation

Column I Column II
1 Retina a Path way of light
2 Pupil b Far point comes closer
3 Ciliary muscles c near point moves away
4 Myopia d Screen of the eye
5 Hypermetropia e Power of accomodation

Match the following:

Column - I Column - II
1. Retina a. Path way of light
2. Pupil b. Far point comes closer
3. Ciliary muscles c. near point moves away
4. Myopia d. Screen of the eye
5. Hypermetropia e. Power of accommodation

Match the following:

Column - I Column - II
1. Retina a. Path way of light
2. Pupil b. Far point comes closer
3. Ciliary muscles c. near point moves away
4. Myopia d. Screen of the eye
5. Hypermetropia e. Power of accommodation

Arrange and rewrite the term in group in correct order to be in a logical sequence, beginning with the term that is underlined:

Pupil, Aqueous humour, Retina, Vitreous humour.


Share
Notifications



      Forgot password?
Use app×