Question

Write an activity to prove rectilinear propogation of light.

Answer 1

Answer:

rectilinear propagation of light means that light travels in a straight path

Explanation:

material required.... a straw and a lit candle

objective.... to prove rectilinear propagation of light

procedure

1. take a lit candle and try seeing it from a straw

2. now bend the straw and see the light

observation... we see that when the straw is bent

we cannot see the candle

Answer 2

Answer:

Take a flexible hollow plastic tube  and a source of light ( eg: bulb, candle).

Now, hold the tube straight and point the open source to the source of light. Try seeing through it.... You will observe that you can see the light.

Now, bend the tube and try seeing through it. You will observe that you won't be able to see the light.

Hence, it is proved that light travels in straight line.

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