Other animals can see parts of the spectrum that humans can’t. For
example, a large number of insects can see ultraviolet (UV) light.
Light travels very, very fast. The speed of light in a vacuum (an area empty of matter) is around 186,000 miles per second (300,000 kilometres per second).Photosynthesis is a process that involves plants using energy from sunlight to convert carbon dioxide into food.
Sunlight can reach a depth of around 80 metres (262 feet) in the ocean.
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