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Ultraviolet Lesson 4
What is SPF? Why is it important ?
Sun Protection Factor ,[object Object],[object Object],[object Object]
Too much exposure can lead to severe sunburn.
Damage to deep layers is called ‘third degree’ sunburn. outer skin layer middle skin layer deep skin layer First-degree burn Second-degree burn Third-degree burn
Intensity of light and heat The light here is very intense! The light here isn’t so bad...  Why? When a body absorbs radiation the amount of energy it gains depends on the intensity (a bit like ‘strength’) and the time of the exposure.
Is a sun-tan really worth it? What are the 3 most important things you’ve learnt today? How will what you have learnt affect your sunbathing behaviour?

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Uv1

  • 2. What is SPF? Why is it important ?
  • 3.
  • 4. Too much exposure can lead to severe sunburn.
  • 5. Damage to deep layers is called ‘third degree’ sunburn. outer skin layer middle skin layer deep skin layer First-degree burn Second-degree burn Third-degree burn
  • 6. Intensity of light and heat The light here is very intense! The light here isn’t so bad... Why? When a body absorbs radiation the amount of energy it gains depends on the intensity (a bit like ‘strength’) and the time of the exposure.
  • 7. Is a sun-tan really worth it? What are the 3 most important things you’ve learnt today? How will what you have learnt affect your sunbathing behaviour?