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8 followers study24x7 22 Jan 2019 03:17 PM study24x7 study24x7

Name the defects of vision. - Myopia(or) Short sightedness - Hypermetropia (or) Long sightedness - Presbyopia - Astigmatism

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8 followers study24x7 22 Jan 2019 03:17 PM study24x7 study24x7

What is near point of the eye? Near point of the Eye is the closest point at which an object can be seen clearly. For a normal eye, the near point lies at 25 cm from the eye (least distance of distinct vision).

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8 followers study24x7 22 Jan 2019 03:17 PM study24x7 study24x7

What is the far Point of the eye? It is the farthest point at which the object can be seen clearly. For a normal eye, the far point lies at infinity.

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8 followers study24x7 22 Jan 2019 03:17 PM study24x7 study24x7

Define accommodation of an eye. The ability of the eye to focus both near and distant objects, by adjusting the focal length is called the accommodation of the eye or the ability of the ciliary muscles to change the focal length of the eye lens is called accommodation.

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8 followers study24x7 22 Jan 2019 03:17 PM study24x7 study24x7

What is a persistence of vision? The image of an object seen persists on the retina for 1/16 second even after the removal of the object. This continuance of sensation of an eye for some time is called persistence of vision

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8 followers study24x7 22 Jan 2019 03:14 PM study24x7 study24x7

All About Human Eye - CBSE Class class 8 - Science Human eye can be considered as an optical instrument. Light rays coming from the object to be seen enter the eye through Cornea and fall on the eye lens through the pupil of the eye. Cornea The transparent spherical membrane covering the front of the eye. Iris The coloured diaphragm between the cornea and lens. It gives colour to the eye. Pupil The small hole in the iris. Eye lens It is a transparent lens made of a jelly like material. It is a double convex lens forms a real inverted and smaller image of the object on the retina. Ciliary muscles These muscles hold the lens in position. Retina The back surface of the eye. The image is formed on the retina. The retina contains cells called rods and cones to detect colour and intensity of the image. Blind spot The point at which the optic nerve leaves the eye. An image formed at this point is not sent to the brain. Aqueous humour A clear liquid region between the cornea and the lens. Vitreous humour The space between eye lens and retina is filled with another liquid called Vitreous humour.

All About Human Eye - CBSE Class class 8 - Science

H...
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8 followers study24x7 21 Jan 2019 02:53 PM study24x7 study24x7

Find x in the following figures - Class 8th CBSE Mathematics

Find x in the following figures - Class 8th CBSE Math...
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8 followers study24x7 21 Jan 2019 02:52 PM study24x7 study24x7
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8 followers study24x7 21 Jan 2019 02:52 PM study24x7 study24x7

Q. What are the advantages of using CNG and LPG as fuels? - CBSE Class 8 - Science - Coal and Petroleum Ans: - They are used as non-polluting fuels to transport vehicles. - CNG is used for power generation and is a cleaner fuel. - LPG can be used directly for burning in homes and factories. - LPG and CNG has virtually no ash particles left after burning.

Q. What are the advantages of using CNG and LPG as fu...
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8 followers study24x7 14 Jan 2019 05:18 PM study24x7 study24x7
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8 followers study24x7 12 Jan 2019 02:58 PM study24x7 study24x7

Identify Idioms in the following sentences. He is prepared to do anything for the sake of his friends.

A

Prepared to

B

To do anything

C

Do anything for

D

For sake of

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8 followers study24x7 12 Jan 2019 02:53 PM study24x7 study24x7

Expression on left and right side of equality respectively are called:

A

RHS, LHS

B

LHS,RHS

C

LS,RS

D

LH,RH

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8 followers study24x7 12 Jan 2019 02:51 PM study24x7 study24x7

Choose the correct example of an illative conjunction

A

For

B

Or

C

And

D

Though

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8 followers study24x7 12 Jan 2019 02:49 PM study24x7 study24x7

Choose the correct example of an illative conjunction

A

I do not know, where she lives

B

She will pass, for she works very hard

C

Dont let yourself down

D

He is slow, but he is steady

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8 followers study24x7 10 Jan 2019 12:24 PM study24x7 study24x7

From the word puzzle given as find atleast eight words which are ‘farmer’s friends.’ Classify them into living and non living.

From the word puzzle given as find atleast eight word...
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  • Shobhit Garg
  • Earthworm
    8 followers study24x7 10 Jan 2019 12:22 PM study24x7 study24x7

    The term used for the process of separation of grains from chaff is

    A

    sieving

    B

    threshing

    C

    winnowing

    D

    hand picking

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    8 followers study24x7 10 Jan 2019 12:21 PM study24x7 study24x7

    Which of the following statement is not true for organic manure?

    A

    It enhances water holding capacity of soil.

    B

    It has a balance of all plant nutrients.

    C

    It provides humus to soil.

    D

    It improves texture of soil

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    8 followers study24x7 10 Jan 2019 12:21 PM study24x7 study24x7

    Propagation of ginger is generally done using

    A

    seed

    B

    stem (rhizome)

    C

    root

    D

    leaf

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    8 followers study24x7 10 Jan 2019 12:20 PM study24x7 study24x7

    Which one of the following condition is not essential to grow maize?

    A

    High temperature

    B

    Humidity

    C

    Low temperature

    D

    Rainfall

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    8 followers study24x7 09 Jan 2019 05:44 PM study24x7 study24x7

    What are cumulative conjunctions?


    A

    It joins two statements

    B

    It joins two different words

    C

     It joins phrases

    D

    All

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