Natural Phenomenon
Rainbow
A rainbow is created when white light is bent while entering a droplet of water, split into separate colours, and reflected back. A rainbow is actually round like a circle. On the ground, the bottom part is hidden, but in the sky, like from a flying airplane, it can be seen as a circle around the point opposite the Sun.
Rainbows often appear after storms, and are popular symbols for peace and harmony in many cultures.
The rainbow effect can be seen when:
- There are water drops in the air; and
- The sun is giving light at the back of the observer at a low distance up or angle.
Sunlight is white, and is a mixture of many different colours. Water and other materials bend the different colours at different angles, some more strongly than others. This is called dispersion. By splitting up white light into separate colour, rainbows appear colourful even though the light hitting them is whites.
The rainbow displays with the deepest effect in our minds take place when:
- Half of the sky is still dark with draining clouds; and
- The observer is at a place with clear sky above.
- at the edges of clouds lit from the back; or
- as upright bands of spectrum in far away rain even if it does not fall on the earth.
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