New Delhi, May 3: The Sun is the primary source of life on Earth. It plays a crucial role in everything from agriculture to climate control. In just one hour, the Sun provides enough energy to meet the annual energy needs of humanity. Amid the ongoing climate crisis, characterized by energy shortages and pollution, solar energy has emerged as the most affordable, clean, and unlimited energy source. Every year on May 3, International Sun Day is celebrated to promote the importance of solar energy.
The process of converting solar energy into electricity is known as ‘solar power.’ This technology is nearly 200 years old but has now reached applications from homes to outer space. Solar power not only generates electricity but also protects the environment, as it produces no smoke, pollution, or noise—just sunlight is needed.
According to NASA, solar power refers to the conversion of sunlight into electricity. This process is based on the ‘photovoltaic effect.’ In 1839, French scientist Alexandre Edmond Becquerel discovered this effect at the age of just 19 while conducting experiments in his father’s lab. His work with light led to the generation of an electric current, laying the foundation for solar power.
Scientists explain that solar panels are primarily made from a material called silicon. Silicon is a semiconductor, meaning it can easily control electricity. A typical solar cell consists of three thin layers of silicon. The middle layer is pure silicon, while the upper and lower layers contain slightly different elements, such as phosphorus on one side and boron on the other. When sunlight hits these layers, the electrons within the silicon become excited and start moving. This movement creates a negative charge on one side and a positive charge on the other. By connecting wires to both sides, a circuit is formed. The flowing electrons generate electricity that we can use.
Notably, this entire process produces no smoke, pollution, or noise—only sunlight is required to generate electricity. Solar panels are so effective that space agencies use them in spacecraft. NASA reports that the James Webb Space Telescope also derives its power from solar panels.
NASA is continuously working to improve solar technology. The first successful use of solar power in space occurred in 1958 when the United States launched Vanguard 1, the first solar-powered satellite. Prior to this, satellites like Sputnik and Explorer 1 operated solely on batteries, which lasted only a few weeks. In contrast, Vanguard 1 transmitted data for six years. Today, solar power is used for domestic electricity, street lighting, water pumps, and large solar parks.
My name is Ganpat Singh Choughan. I am an experienced content writer with 7 years of expertise in the field. Currently, I contribute to Daily Kiran, creating engaging and informative content across a variety of categories including technology, health, travel, education, and automobiles. My goal is to deliver accurate, insightful, and captivating information through my words to help readers stay informed and empowered.
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