Science Project on “Invisible Light”, Project Experiment Topics on Light, Sound, Maths, Optical Illusion for Class 8, 9, 10 and 12 Students.

Invisible Light

Materials Required:

1. A flashlight
2. A small cardboard box
3. A pair of scissors
4. Talcum powder
5. A dark room
6. An adult

While some types of energy can be seen, others remain invisible. Paradoxically, a beam of light energy is also considered to be invisible.

This type of energy can only be seen, when light energy falls on the human eyes, or gets reflected on some object and then enters the eye.

If you observe properly, you will see that even the light rays coming from the sun cannot be seen by the eye.

You can only record and see the objects on which the light rays fall. There are also instances, when you can see the sun’s light rays emerge through the clouds.

This too happens because of the light energy bouncing off millions of dust particles that lie scattered in the air. Also, the essence of the rainbow is actually the water droplets in the atmosphere, after a rainstorm, which reflect the rays, thereby leading to the appearance of the rainbow. There are also many other rays emitted by the sun, like ultraviolet rays, which too cannot be seen.

To see the light rays, take the help of an adult, in cutting a small hole in a cardboard box, maybe a shoe box and place a flashlight inside the box with the bulb facing the hole.

Put on the flashlight and close the lid, making sure that the hole is the only opening from where the light can come out from.

Place the box in a very dark room and now spread some powder in front of the hole. You will now be able to see the light rays, as they bounce off the powder particles.

These kind of light rays can be very useful in determining the presence of particles, which are very small to be noticed by the naked eyes. For example, replace the powder by clapping two blackboard dusters together. You will see all the dust flying off them.