- Books Name
- Class-8 Science Book
- Publication
- PathSet Publications
- Course
- CBSE Class 8
- Subject
- Science
What is Braille System?
The Braille system
- Braille is a tactual aid for visually challenged people that allow them to read and write.
- It was developed by a visually challenged person called Louis Braille. This system was published by him in 1821 however the present Braille System was adopted in 1932.
- For many common languages including Hindi, Sanskrit, Tamil, Telugu, Mathematics and scientific notations a Braille code is present.
- In the Braille code, there are 63 Dots or 63 Characters.
- These are arranged in a cell of two vertical rows having three dots each.
- The patterns are embossed on a Braille Sheet that allows a person to read by touching the pattern. Each character in the Braille system can represent:
- a letter
- a combination of letters or a word
- a grammatical sign
The eyes of animals have different shapes
- Crab: Crabs have small eyes but they can look all around with them even behind them.
- Butterflies: Butterflies have big eyes that consist of thousands of small eyes which allow them to see in the front and at the back.
- Night owls (Night Birds): Night owls are able to see things more clearly at the night rather than in day time. This is so because the cornea of their eyes is large with a large pupil which allows light to enter into the eye at night time. However, their eyes have a large number of rod cells rather than cones that allow them to see things at night easily.
- Kites and Eagles (Day Birds): These birds can see very well during the daytime but have decreased vision at night. This is because they have a large number of cone cells and a few rod cells.