Global Gk

Why Is the Sky Blue? When you look up on a clear day, the sky looks bright blue. But why blue? Why not green or purple? The answer is in the way sunlight travels through the air. Sunlight Is Not Just White The light from the sun looks white, but it’s actually a mix of many colors. You can see this in a rainbow—red, orange, yellow, green, blue, and violet. Each color is like a different “flavor” of light. 👉 Example : Think of sunlight like a box of colored pencils. You don’t see them separately at first, but they’re all there. What Happens in the Sky When sunlight enters the air around Earth, it bumps into tiny gas molecules (like oxygen and nitrogen). This makes the light spread out in all directions. This spreading is called “scattering.” Blue light scatters the most because it travels in short, quick waves. Red light scatters the least because it travels in long waves. 👉 Example : Imagine throwing small stones and big balls into a pond. The small stones make ripples spread out quic...