Light travels in straight line: School science project

Experiment: Light travels in a straight line

Materials needed: Torch, 3 cardboard pieces of the same sizes, Blackboard (or a black-covered book)

Procedure:

Make a hole in the three cardboards.

First Setup:

• Place the 3 cardboards in a straight line.
• Place a torch at one end and a blackboard at the other end, with the three cardboards in between.
• Turn on the torch and point it at the hole of the first cardboard, check if light falls on the blackboard.

Second Setup:

• Take the middle cardboard and raise (or lower) it slightly so that the holes are not in line.
• Turn on the torch and point it at the hole of the first cardboard and check if light still falls on the blackboard

Observation:

• In the first setup, light falls on the blackboard.
• In the second setup, light does not fall on the blackboard.

Conclusion:

The experiment proves that light travels in a straight line.