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Tuesday, July 5, 2011

Ultra Violet Rays - Amrit, Zhixiang, Mohit

We learnt that
  • Sunlight consists of 2 types of light waves or radiation; visible and invisible. Visible light has a spectrum of 7 colors ranging from red to violet. Invisible ultraviolet (UV) radiation is not possible for detection to the human eye, e.g. infrared and X-rays. UV radiation is further divided into 3 different types – UVC, UCB and UVA. 
  • The very toxic UVC is filtered out by the ozone layer. The ozone layer also filters UVB but about 1% of UVB still passes through to reach earth. UVB is what causes sunburn and even skin cancers after prolong exposure. 
  • Whether the weather is windy, cloudy or foggy during the day, harmful UV rays are still able to penetrate through. 

9 comments:

  1. What about UVA? Are they able to pass into the earth?

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  2. I would like to know whether it is UCB or UVB?

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  3. What are the uses and dangers of UV rays, and what are the clear differences of the 3 UV waves?

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  4. How does these ultra violet rays damage our skins? how does it affect us?

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  5. How do the UV rays penetrate through windy, cloudy or foggy weather?

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  6. What is UVA and what does it cause?

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  7. What are the dangers of all three types of ultra-violent waves?

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  8. What are the properties of the 3 waves,and how are infrared and x-rays related to UV rays.

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  9. what are the different levels of damage done lol trololo

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