It is system of raised dots that can be read with the fingers by blind people or people who have low vision.
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What is Braille system?
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Boojho planned an activity to observe an object A through pipes as shown in figure below, so that he could see objects which he could not directly see.
(i) How many mirrors should he use to see the objects? (ii) Indicate the positions of the mirrors in the figure. (iii) What must be the angle with respect to the incident light at which he should place the mirrors? (iv) Indicate the direction of rays in the figure. (v) If any of the mirrors is removed, will he be able to see the objects?
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