New Delhi, March 29: Humans have harnessed sunlight and heat for thousands of years. However, the technology to convert solar energy into electricity, known as solar power, is less than 200 years old. In this short span, solar power has emerged as a significant source of unlimited electricity worldwide. Today, it is utilized in homes and even in space.
Solar power is a cost-effective, clean, and limitless energy source. It not only generates electricity but also plays a crucial role in environmental conservation.
According to NASA, solar power refers to the process of converting sunlight into electricity. This process is based on the “photovoltaic effect.” In 1839, French scientist Alexandre Edmond Becquerel, then just 19 years old, discovered this effect while experimenting in his father’s lab. His work with light led to the generation of electric current, laying the foundation for solar power.
How do solar panels work? 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 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 to move. 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. According to NASA, the James Webb Space Telescope also derives its power from solar panels. NASA is continuously working to improve solar technology.
The use of solar power in space began with the successful application of solar cells in 1958. In March of that year, 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 would deplete within weeks. In contrast, Vanguard 1 transmitted data for six years. Today, solar power is employed in residential electricity, streetlights, water pumps, and large solar parks.
My name is Himanshu Tiwari. I am an experienced content writer with several 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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