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 UV light  



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Author4 Posts
  #1

which uv rays cause more damage ? a or b?
so far as i recall it is b? right?
cos' not very sure




  #2

There is a question in USMLE Q-bank...So, I just looked at my notes...you are right.
There are UVB (290-320 nm wavelength)- sunburn, immunosupression, ca, skin aging and UVA(320-400) contribute a little for sunburn, there are UVA1 and UVA2.
The question was about sun screen. For UVB- PABA esters, for UVA- avobenzone, for both- use Zn-containing


UVB---Bad
UVA---Avobenzone




  #3

thnx sigh


  #4

FYI, if I recall correctly:

UVC is the worst of all -- but Ozone blocks it out





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