Tuesday, October 9, 2012

Why does the grass look green?

                                 Why does the grass look green?

We know in a day, a grass looks green. the sunlight is mixure of 7 colours as we see in a rainbow. But why the grass looks green , why not other colours such as red or blue?
The colours what we see are the colours those are reflected. That means all the other colours are absorbed or kept. Grass looks green because it has chlorophyll, which absorbs blue and red light and bounces off or reflects only the green light. , giving grass a green colour. But why does the chlorophyll reflects only green light , why not other colours?
Light has energy. Chlorophyll absorbs or keeps the right light which is necessary for photosynthesis of plants. Through this, a plant can convert carbon di oxide and water to glucose and oxygen . Green is usually the leftover light that is not absorbed and is then reflected, making us see the grass green.

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