The orange light in the sky is caused by the scattering of sunlight by particles in the atmosphere. When sunlight passes through the atmosphere, it is scattered by molecules of nitrogen and oxygen. The blue light waves are scattered more strongly than the other colors, so the sky appears blue. However, at sunrise and sunset, the sunlight has to travel through more of the atmosphere to reach our eyes. This means that more of the blue light is scattered away, and the light that reaches our eyes is more orange in color.

In addition to molecules, the atmosphere also contains particles such as dust, smoke, and water droplets. These particles can also scatter sunlight, and they can contribute to the orange color of the sky at sunrise and sunset.

The amount of orange light in the sky can vary depending on a number of factors, including the time of day, the location, and the weather conditions.