Have you ever looked up at a clear afternoon sky and wondered: why is the sky blue ? It's one of those everyday phenomena that many of us take for granted, yet the answer is rooted in fascinating physics and the natural interaction between sunlight , the Earth's atmosphere , and the principles of light scattering . Understanding this concept gives us a glimpse into how our world works and reveals just how beautiful science can be. ☀️ The Nature of Sunlight : More Than Meets the Eye Although it appears white to the human eye, sunlight is actually composed of a spectrum of colors. When light passes through a prism , it separates into different colors: red, orange, yellow, green, blue, indigo, and violet. These colors correspond to different wavelengths , with red having the longest and violet the shortest. So when sunlight enters Earth's atmosphere, it doesn’t just shine through unaffected. It interacts with particles and gases, including nitrogen and oxygen molecules, c...