The twinkling of stars is caused from light efraction by various layers of the atmosphere with different refractive indices.
- The twinkling of stars is caused by light refraction by various layers of different refractive indices. When we look at a star from the ground, it doesn’t always twinkle.
- It still emits light, but our surroundings make it seem as if it is twinkling. With different refractive index, our atmosphere has different layers.
- When a light hits the earth’s atmosphere from a distance, it begins to refract the light into any layer that reaches. That’s why we see the twinkling of stars.