Re: [問題] 外太空的紫外線強度
※ 引述《haryewkun (Har)》之銘言:
: 請問,外太空的紫外線,平均比大氣層內的紫外線,強多少倍?
: 有這方面的資料嗎?
: 至於外太空的範圍,應該是限制在地球到月球之間的距離,既不會跑到水星
: 那麼靠近,也不會跑到木星、土星以外那麼遠。
: 至於大氣層內,則是限制在一般人生活的地面(海拔零),不包括那些臭氧
: 層有破洞的地方,也不包括高空。
: 或者說,要開發太空船去月球,大概要考慮抵禦多強的紫外線及輻射?
: 上網搜索,有人說是一萬倍,不知道這個數字有沒有水分……
自己回自己……在wikipedia的Ozone layer找到的資料:
- UV radiation is divided into three categories, based on its
wavelength; these are referred to as UV-A (400-315 nm), UV-B
(315-280 nm), and UV-C (280-100 nm).
- UV-C, which would be very harmful to humans, is entirely
screened out by ozone at around 35 km altitude.
- UV-B radiation can be harmful to the skin and is the main cause
of sunburn; excessive exposure can also cause genetic damage,
resulting in problems such as skin cancer.
- The ozone layer is very effective at screening out UV-B; for
radiation with a wavelength of 290 nm, the intensity at Earth's
surface is 350 billion times weaker than at the top of the
atmosphere.
- Most UV-A reaches the surface;
看到這個數據被嚇到了:UV-B是對人體皮膚有害的,而它在太空的強度是地
球上的三千五百億倍?
如果是這樣,那些在太空中漫遊的太空人怎麼辦?太空服足夠抵擋嗎?
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