Light all around us By zicora Nwandu

. . ALL AROUND US BY IICORA NWANDU. Light all around us.

. . . What is Light? 1.

. . Light is a type of electromagnetic radiation that allows the human eye to see or makes objects visible. It is also defined as visible radiation to the human eye. Photons, which are tiny packets of energy, are found in light. Light always moves in a straight line..

. . WHY DO WE NEED LIGHT?. Why do we need light? 2.

Light allows us to see the surrounding world by distinguishing details, individual colours, movement, brightness. It has a very big impact on a human in terms of the physiology and psyche. But light also has extremely important functions in relation to a lot of biological processes that occur in our body. This is, e.g., the correct metabolism, blood circulation and hormone balance of a human. 5.

. . why are shadows black in colour?. 6. 3.

“ When a shadow is formed it happens due to absorption of all light by an object from a light emitting source. As a result, a shadow is produced which is due to absorption or absence of light, hence black in colour. 7.

. . Thank you !. Any questions?. 8.