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comment How important is thermal underwear for skiing?
I agree with this answer. With -3C as the minimum, thermal underwear would be nice to have, but it's not a must... especially if its just for two days.
Jul
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comment How important is thermal underwear for skiing?
-2 or -3 degrees Celsius or Fahrenheit?
Jul
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comment How harmful is the rising/setting sun?
@Eyal You probably know that the sun looks redder at sunset. This is because when then sun passes through more atmosphere (as Rory Aslop mentioned), Rayleigh scattering, which is inversely proportional to the fourth power of wavelength, becomes more important. This means that shorter wavelengths (blue) get scattered more than longer ones (red). Since UV light is of shorter wavelength than visible light, it gets scattered even more. The situation is therefore actually even better for you than what those graphs show.
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answered How harmful is the rising/setting sun?
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