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  • How can solar energy be harnessed? Mention any two limitations in using solar energy. How are these limitations overcome?

How can solar energy be harnessed? Mention any two limitations in using solar energy. How are these limitations overcome?

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There are two ways solar energy is harnessed:

Indirect Way: Lot of organisms absorb sunlight and make their food (autotrophs) which are the primary food sources in a food chain. This energy is passed on to higher trophic levels.

Direct Way: Using solar panels to absorb solar energy and converting into electrical energy.  The various devices which are used to convert the solar energy into various usable forms are solar cooker, solar heater, solar power plants, solar furnaces and solar cells.

Limitations of solar energy:

1) Cost of initial set up is very high.

2) The distribution of solar energy is not uniform. For example, European nations have less sunlight as they are close to poles but nations like Africa, Saudi Arabia, India has a lot of sunlight all around the year.

3) Takes a lot of area to set up solar energy farms.

4) Solar energy is not available in night time so energy needs to be stored in battery and used in night.

5) Based on moment of sun and clouds lot the energy output of solar panels will vary all the time.

The limitations can be overcome by:

Use of solar cells: Converting solar energy into electrical energy and storing them for future use.

A large number of solar cells combined in an arrangement is called a solar cell panel. It can deliver enough electricity for practical use.   

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