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Physics P1 GCSE The Sun and Ozone
The sun produces ultraviolet radiation. UV radiation can cause: premature skin ageing skin cancer cataracts in older people sunburn
Sunscreen is a way of protecting yourself from harmful UV. The higher the factor the longer amount of time you can safely stay out in the sun.
Safe time =Recommended Exposure time x Sunblock factor
People with darker skin can stay out longer in the sun since their skin absorbs more UV radiation so less reaches body tissue underneath
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