Ultra violet radiation
Working in the garden is a pleasure for all keen gardeners. The fresh air, warmth of the sun and connecting with nature is a basic desire for us all. However, exposure to sunlight does raise some concerns.
Sunlight not only helps us grow the plants we like, we also recognise ultraviolet radiation (UVR) is a major factor causing skin and eye damage. However, effects of solar UVR light are fairly complex and a basic knowledge of this is relevant
In the open, only about half the solar UVR comes directly from the sun. The rest is scattered UVR from the sky, so even in the shade any visible patch of sky is a source of UVR. This explains why babies still burn in the shade of a beach umbrella. Almost paradoxically, it is possible to have a situation where moving from the sun to the shade increases the levels of UVR, if the position in the shade ‘sees’ more of the sky.
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