Describe the benefits of deriving electric energy from sunlight in contrast to the conventional energy generation. What are the initiatives offered by our Government for this purpose? (UPSC Mains GS3 )
It has been known for more than 150 years that light can have an effect on the electrical properties of some materials. This is called the photoelectric effect. In 1921, Einstein received the Nobel Prize for his work explaining this. Photovoltaic cells are based on a related phenomenon called the photovoltaic effect, and they convert light directly into electricity.
Benefits of obtaining electric energy from sunlight
Disadvantages of obtaining electric energy from conventional sources
Initiatives offered by our Government for this purpose
Conclusion:
Solar power is an immense source of directly useable energy and ultimately creates other energy resources: biomass, wind, and hydropower and wave energy. Most of the Earth’s surface receives sufficient solar energy to permit low-grade heating of water and buildings, although there are large variations with latitude and season. At low latitudes, simple mirror devices can concentrate solar energy sufficiently for cooking and even for driving steam turbines.
Topics Covered - Electric Energy
98 videos|195 docs|52 tests
|
|
Explore Courses for UPSC exam
|