Double rainbows occur when sunlight is reflected twice inside raindrops, creating a secondary rainbow that appears outside the primary one. US TV’s longest-serving female anchor announces exit ...

Light refracting and reflecting through a water-filled round-bottom flask makes a rainbow, as light through a raindrop does. A faint secondary rainbow may be visible. The flask has a reflective ...

Third and fourth strands of the rainbow are visible - the first two are behind the photographer Only five triple rainbows had been spotted in the last 250 years ...

There are three primary colours of light, which can be combined to make secondary colours. A rainbow contains all the colours of the visible spectrum. It is often possible to see a secondary bow ...