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Question

What is a Braille System?


  1. A device for better audio experience
  2. It establishes a relation between an incident light and the reflected one
  3. An algorithm for visual input to a computer
  4. A popular aid for visually challenged people


Solution

The correct option is D A popular aid for visually challenged people

The most popular aid for visually challenged persons is the Braille system. There is a braille code for common languages, mathematics and scientific notation. Braille system has 63 dot patterns or characters. Each character represents a letter, a combination of letters, a common word or a grammatical sign. Dots are arranged in cells of two vertical rows of three dots each. These patterns when embossed on Braille sheets help visually challenged to recognise words by touching. To make them easier to touch, the dots are raised slightly.

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