Question

It is said that light travels in a straight line. How will you prove this? What is the result of this? [3 MARKS]

Answer 1

Proof: 2 Marks
Result: 1 Mark

We can easily prove that light travels in a straight line because the moment we put some opaque object in front of our eyes, we are unable to see anything that would be reflecting light. If the light wasn't travelling in a straight line, some light should have had fallen into our eyes.


When the light gets obstructed by some object, a dark patch is formed directly behind it since light cannot pass through the object. The dark patch is called a shadow of the object.