Why Is Light Important To The Earth?

Light is one of the important necessities of life without which life is not possible on earth. First of all light is necessary for plants for the process of photosynthesis through which plants gain their energy. If plants do not get light they will not be able to be used as a food item by the animals and humans as well. It is also very important for vision since without light we cannot see any object it is a well proven theory that whenever light strikes and object and is then reflected back to our eyes only then the image of the object is created so without light it is not possible to see anything which will always hamper the movements of humans and animals as well.

Light is also used as a source of energy; solar light is stored in solar batteries which could be then used latter on for different purposes. Sunlight is used by some animals to convert the cholesterol in their body to vitamin D. In addition the sunlight and Vitamin D is also important for human skin. The sunlight gives enough warmth to our earth which would not have been possible from any other source, i.e. there are sources of heat but they are very costly and a lot of effort is consumed which is saved with sunlight.

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