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12 grade physics others

Which wavelength of sun is used finally as electric energy?A) Radio wavesB) Infrared wavesC) Visible lightD) Microwaves

Profile image of Aniket Singh
1 Year agoGrade
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Profile image of Askiitians Tutor Team
1 Year ago

The correct answer is C) Visible light.
The Sun emits electromagnetic radiation across a broad spectrum, including radio waves, infrared waves, visible light, ultraviolet light, X-rays, and gamma rays. However, the portion of the spectrum most effectively used by living organisms and technology for converting into electric energy is visible light.
Why Visible Light?
• Photosynthesis: Plants, algae, and some bacteria use visible light for photosynthesis, the process by which they convert light energy into chemical energy.
• Solar Cells (Photovoltaic Cells): In solar energy technology, solar panels use visible light as the primary source of energy. When sunlight hits the semiconductor material in a solar panel, it excites electrons and generates an electric current, a process called the photoelectric effect. This effect is most efficient with visible light because the energy of visible photons corresponds well to the energy levels needed to excite electrons in typical photovoltaic materials like silicon.
While the Sun does emit a significant amount of energy in the infrared and ultraviolet ranges, the energy that is directly converted into electrical energy by most technologies is primarily from visible light.