Question

Chapter-16 - Light
Perform an activity to show that light travels in a straight line.
Materials required – Candle, straw and matchstick.
Procedure- Carefully lightens up the candle with the help of the
matchstick under the supervision of your parents. Use a broad pipe or
straw to see the flame of the candle. Now, write your observations under
two conditions:
a. When the straw is straight.
b. when the straw is bend.​

Answer 1

Take a rubber tube, stretch it straight and look through it at the flame of the candle with one eye (keeping the other eye closed) [see Figure (a)]. We will find that when the rubber tube is straight, we can see the light of candle flame through it.

Hope it helps..

Answer 2

Answer:

light travels in a straight line .

Explanation:

a. when the straw is straight flame can be seen or its visible that means light travels and appears(seen) when straw is straight while

b. when straw is bend the flame cannot be seen that means / it proves that light travels in a straight line

thankyou...