No nonsense answers to questions we are often asked
What is the difference between UVa, UVb and UVc?
Ultra Violet Radiation comes
from the sun and is split into bands of wavelengths: UVa, UVb and
UVc.
UVc is the most highly energetic form but is quite easily scattered. Fortunately we are protected from UVc by the atmosphere - especially the Ozone Layer - so UVc radiation only hits the earth in those places where the Ozone Layer is missing.
UVa and UVb are both potentially dangerous but pose different threats. For years the threat from UVb was considered greatest. These rays have shorter wavelength and more energy than UVa. They are most associated with burning, are strongest during the period of 10am to 4pm but are reduced by clouds and shade so the level of threat varies during the day. Why not ask an advisor at one of our pods for an up to the minute meter reading?
Much more attention is now being paid to UVa rays. These are the longest in wavelength and are the least energetic, but they do sink deepest into the layers of the skin and are much less affected by clouds, shade or the time of day. In other words they are constantly with us. They are particularly associated with ageing of the skin, wrinkles and so on.
All these UV rays are associated with skin cancers. The most cancer-dangerous to humans is UVb. Protect yourself with a broad spectrum sunscreen.
Trust P O G U I N - our friendly team members will be very happy to give you more details.
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