Question

When a beam of sunlight enters a closed room through a window, then its path becomes visible to us. And when a beam of sunlight passes through the canopy of a dense forest, even then its path becomes visible to us.

1. What makes the path of sunlight beam entering through a window into a closed room visible to us?
2. What makes the path of sunlight beam passing through a canopy of dense forest visible to us?
3. Name the scientist who studied the above phenomena.

Answer 1

1. The path of the sunlight beam entering a closed room through a window becomes visible due to the scattering of light by fine dust particles present in the air.
2. The path of the sunlight beam passing through the canopy of a dense forest becomes visible due to the scattering of light by tiny water droplets, dust particles and mist present in the atmosphere.
3. John Tyndall