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Understanding UV Radiation Absorption: Sunscreen Effectiveness and Risks of Sunburn

This article explores how various substances absorb UV radiation and the implications for sun safety. Key findings reveal that swimming in water does not prevent sunburn, as water does not absorb significant UV radiation. Additionally, sitting in a south-facing window can lead to a fleeting tan, while olive oil is ineffective as a sunscreen against harmful radiation. In contrast, 4-aminobenzoic acid has been found to provide protection against the most damaging UV rays. These insights help in making informed decisions regarding sun exposure and skin protection.

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Understanding UV Radiation Absorption: Sunscreen Effectiveness and Risks of Sunburn

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Presentation Transcript

  1. A 2.1 What substances absorb UV radiation ?

  2. 4 5 6 7 8 9 10 11 What are your conclusions concerning : a) whether you can be sunburnt whilst swimming ? Yes – water does not absorb any relevant UV radiation

  3. 4 5 6 7 8 9 10 11 What are your conclusions concerning : b) the chances of getting tanned sitting in a south facing window on a sunny day? Yes – but only a quick fading tan

  4. 4 5 6 7 8 9 10 11 What are your conclusions concerning : c) the use of olive oil as a sunscreen ? Does not protect against the most damaging radiation

  5. 4 5 6 7 8 9 10 11 What are your conclusions concerning : c) the use of 4-aminobenzoicacidas a sunscreen ? Protects against the most damaging radiation

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