Question

1. Give a detailed account of an activity to illustrate
that light travels in a straight line.
2. Explain the structure of the human eye.
3. Describe "The Braille system
4. What is the role of nutrition in blindness?
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Answer 1

Answer:

Light travels in a straight line can be observed by keeping an object in the path of light. In an atmosphere which is bit dusty, we can see light traveling in a straight line. Light emerging from the torch, train and lamps always travel in a straight line. Let us study in detail how does light travel in a straight line.