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Western Australia |
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| On the way to Rottnest Island you pass Freemantle at the mouth of Swan River. On the way back I saw this rainbow at the docks. You see the main bow to the left under an angle of 42° and colours from violet to red. To the right under an angle of 51° you see the minor bow with the colours vice versa. Rainbows originate by the refraction of sunlight in rain drops. The white light is parted into the spectral colours of different wavelenghts. Because the light is refracted twice to create the minor rainbow the sequence of the colours is turned around. You can as well see that the area left of the main rainbow is lighter than the surroundings which is due to the viewing angle. | |||
| see travel diary |
