 Terrestrial atmospheric lens

A terrestrial atmospheric lens refers to a phenomenon where the Earth's atmosphere acts like a lens, bending and focusing light from distant objects. This effect can occur due to various atmospheric conditions such as temperature gradients, humidity, and the overall refractive index of the air. In particular, the concept is similar to how a glass lens focuses light. Specifically, refraction occurs when light passes through air layers of different temperatures (a phenomenon often observed in mirages).