Question

write any experiment to show that light travel in a straight line​

Answer 1

To Do :-

• To show a experiment that light travels in a straight line.

ExperimenT :-

Light travels in a straight line . The phenomenon of light to travel in a straight line is called Rectilinear Propagation of Light .

$\sf\underline{\underline{\red{ Aim \ of \ experiment :- }}}$

• Experimentally verify that Light travels in a straight line .

$\sf\underline{\underline{\red{ Things \ Required :- }}}$

• A cardboard , a candle , a punching machine and a matchbox .

$\sf\underline{\underline{\red{ Procedure:- }}}$

• Take all the three cardboards of equal sizes and arrange them one over another so that they overlap each other .
• Take a candle and mark the height of the candle on the cardboard .
• Taking a puching machine , puch a hole on the three cardboards a little above the mark .
• Now arrange all the cardboard one after another on a table . Put the candle Infront I the boards .
• Light up the candle . Now go to another side of the table and try to see through the hole .
• Again shift the middle cardboard from its position a little bit .

$\sf\underline{\underline{\red{ Observations :- }}}$

• We see that when the cardboards are arranged line by line , we can see the light of the candle when we see through the hole.
• But when we shift the cardboard , we are not able to see the light of the candle .

$\sf\underline{\underline{\red{ Conclusion }}}$

• From all our observations we conclude that the light travels in a straight line .