Questions tagged [uv-light]

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8
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2answers
225 views

To what extent do the levels of UVA, UVB and UVC radiations on the earth surface increase during solar flares?

To what extent do the levels of UVA, UVB and UVC radiations on the earth surface increase during solar flares?
6
votes
2answers
191 views

Can I just walk around Greenland with a UV light and find rare Earth minerals on the ground?

The NPR.org news article and podcast Greenland Is Not For Sale. But It Has The Rare Earth Minerals America Wants is interesting, and it includes a few large GIFs (too large to post here) that appear ...
2
votes
1answer
68 views

Why is the level of UVA radiations on the earth surface the same throughout the day, while the level of UVB significantly varies?

I read on https://www.uexpress.com/ask-the-doctors/2018/1/17/no-matter-the-time-of-day UVA maintains the same intensity all day, which makes dawn-to-dusk sunscreen use important Whereas on ...