Dusk, Dawn, sky, horizon, red, color

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❓ เคช्เคฐเคถ्เคจ / Question

Why does the sky/horizon look red during sunrise and sunset?

✅ เค‰เคค्เคคเคฐ / Answer
The sky appears red during sunrise and sunset due to Rayleigh Scattering. When the sun is low on the horizon, sunlight travels through more atmosphere. Blue light gets scattered away, while red light (which has longer wavelength) passes through and reaches our eyes, making the sky appear red or orange.
Key Point: This phenomenon is called Rayleigh Scattering, named after British physicist Lord Rayleigh.
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