A rainbow is a meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky. It takes the form of a multicoloured arc. Rainbows caused by sunlight always appear in the section of sky directly opposite the sun.
Rainbows can be full circles; however, the average observer sees only an arc formed by illuminated droplets above the ground and centred on a line from the sun to the observer's eye.
Rainbows can be full circles; however, the average observer sees only an arc formed by illuminated droplets above the ground and centred on a line from the sun to the observer's eye.
- 5.1 Multiple rainbows
- 5.2 Twinned rainbow
- 5.3 Full-circle rainbow
- 5.4 Supernumerary rainbows
- 5.5 Reflected rainbow, reflection rainbow
- 5.6 Monochrome rainbow
- 5.7 Higher-order rainbows
- 5.8 Rainbows under moonligh
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