Dùng tia tử ngoại để phát hiện tiền giả
TÁC HẠI CỦA TẦNG OZON BỊ THỦNG.
*Gièng nhau:
Cïng cã b¶n chÊt lµ sãng ®iƯn tõ
Cã c¸c tÝnh chÊt chung cđa sãng ®iƯn tõ
Kh«ng nh×n thÊy ®ỵc
*Kh¸c nhau:
+ Tia Hång ngo¹i: λ = 760 nm → 10 - 3 m ( vµi milimÐt)
+ Tia Tư ngo¹i: λ = 360 nm → 10 - 9 m (vµi nan«mÐt)
(Ánh s¸ng nh×n thÊy: λ = 760 nm →380 nm )
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B) Hồ quang điện.
C) Dây tĩc bĩng đèn cháy sáng.
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