Question

Gurmit wanted to perform an Activity using a laser torch. Her teacher advised her not to do so. Can you explain the basis of the teacher’s advice?

In activity, we throw light in our friend's eye with a torch and observe the size of the pupil.

Answer 1

Laser

1. A laser is an acronym for light amplification by stimulated emission of radiation.
2. It is a device for producing a highly monochromatic, directional and coherent beam of light.
3. A laser is a narrow beam of light with very high intensity and energy.

The harmful effect of laser

1. It is monochromatic light of very high intensity that can be harmful to the human eyes.
2. Lasers are used to destroy kidney stones and in the treatment of cancer. So its use in everyday life will be harmful.

The laser torch is a source of laser light. Laser light has a very high intensity, and hence it is harmful for the human eyes and can even lead to blindness.

Thus, we should avoid looking at a laser beam directly.