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Published on 12 Mar 2015 | over 2 years ago

You will learn about "Introduction to Light" in this video. Light is a form of energy that enables us to see all the things around us.

The main source of light on the earth is the sun. Plants are able to prepare their own food using sunlight.

Some other objects also give out light. They are known as luminous objects. For example, bulbs, lamps, candles etc are luminous objects.

While there are some objects that do not give out light. They are known as non-luminous objects. For example table, cloth, bag, utensils etc. are non-luminous objects.

Non-luminous objects are generally of two types, transparent objects and opaque objects.

Transparent objects are those that allow light to pass through them, like glass, water etc.

While, Opaque objects are those that do not allow light to pass through them, like wood, stone etc.

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