Human Eye - Power of Accommodation of Human Eye - (Chapter 13): CBSE Class 10 Science | Toppr Study
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- Опубликовано: 29 янв 2019
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Human Eye - Power of Accommodation of Human Eye - (Chapter 13): CBSE Class 10 Science
The human eye, the structure of the human eye, the working of the human eye, the importance of the human eye, etc, topics are described in this video of Class 10 Science.
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Human Eye - Power of Accommodation of Human Eye - (Chapter 13): CBSE Class 10 Science
Here we describe the topic as, the power of accommodation of human eye form chapter The Human Eye and The Colorful World of CBSE class 10 science.
Power of accommodation of human eye:
In simple words, we can say as,
The ability of the eye to focus objects lying at different distances is called the power of accommodation of the eye.
We can also define it process as,
The process by which the ciliary muscles change the focal length of an eye lens to focus distant or near objects clearly on the retina is called the accommodation of the eye.
It primarily involves the lens and ciliary muscles.
The ciliary muscles are capable of modifying the curvature of the lens and thereby affecting the focal length of the lens.
When viewing objects which are nearby, the ciliary muscles contract, the lens becomes thicker. It is squeezed into a more convex shape and the focal length decreases (curvature increases). The images again fall on the retina.
Note that here the eye is 'accommodating' by taking a thicker shape so that the image falls on the retina.
When viewing objects which are far away, the ciliary muscles expand, the lens becomes thinner. It is relaxed/loosened into a less convex shape and the focal length increases (curvature decreases). The images again fall on the retina.
Note that here the eye is 'accommodating' by taking a thinner shape so that the image falls on the retina.
However, the focal length of the eye cannot be reduced below a certain minimum limit. If you read a book very close to your eye, it will appear blurred.
The minimum distance, at which objects can be seen most distinctly without strain is called the 'Least Distance of Distinct Vision' or the 'Near point of the eye'.
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When the focal length is distance between optical centre and focus, how could it be vary in case of eye when distance of optical centre (eye lens) and focus (retina) is fixed.
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Nice explanation sir...I have a question that....when we close our eyes then what will happen with our eye lens...it will compress or elongated?????...reply me must and Jai Hind...
Compressed
Compressed bro u don't see in video
I guess the muscle get relaxed because their are no stimuli of light and u know when the ciliary muscle get relaxed the lens become thin so my answer will be :- it get elongated
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Sir can you define the function of yellow spot and crystalline lens. Because there function are same
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Other parts of this chapter?
About near-sightedness and far-sightedness
Sahi me
Agar ek wastu 1meter ki duri par aur dusri wastu thik uske pichhe 5 ya 10miter ki duri par hai (1wastu chhota & 2 wala thoda bada) to humari ankhe 1wastu k liye compress hogi or hum use saf dekhenge lekin dusri wastu k liye to lens ko long hona padega tabhi to saf dikhega parantu hum ek samay me dono ko saf dekh lete hai yesa q
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Thanks, Amit... Be Connected with us. Happy Learning.
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Ya
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That's really great, Balnath Mankar. Be connected with us and share our videos with your friends and others. Keep watching Keep learning.
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You understand why many people have blue eyes many brown many black reason bool tell
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Sir you teach like that its a real incident all study are set in mind for long time . Thankyou sir I impress on your teaching style . Please provide new video in english language of this ch.
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Hey Ram Janam Varma, thank you so much for appreciating our work. Be connected with us and also share our videos with your friends and others. Keep Learning & Happy Learning.
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Not mine use my
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sir video upload karte raho
One subscribe meri taraf se
One nahi two
Exelent sir aap bohot hi jyada achhaaa padate ho i hop sabko meri tarah samaj aya hoga. Aap isi tarah consepts samjhate raho thankyou
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when reflection of light falling on the lens its bend why can you tell
Focus more on study than beauty
i wonder how do the animations work, btw the video has cleared all my doubts i have my due thanks for your efforts
Thanks sir for a wonderful explanation ☺️😌.