A ray diagram showing refraction at the boundary between air and glass Refraction can cause optical illusions as the light waves appear to come from a different position to their actual source.

Optical illusions are visual phenomena where ... This phenomenon is called refraction illusion. A Refraction Illusion occurs when light bends as it passes through different mediums, such as ...

Rainbows form when a unique combination of meteorological and atmospheric conditions come together at the perfect time, and while folklore speaks of a pot of gold at the end, science reveals rainbows ...

The “end” that seems to touch the earth is an optical illusion that changes based on the observer’s position. If you were in an airplane, you might even see a complete circular rainbow.