anything to do with lead?
2006-07-16 23:26:32 · 5 answers · asked by sid 1 in Science & Mathematics ➔ Chemistry
If you mean sunscreen, TiO2 is the most common ingredient. It is a strong absorber from about 385nm and down. It is also the pigment that replaced lead in white paint, so maybe that's the connection you're making.
2006-07-17 01:37:15 · answer #1 · answered by chrisbgsu 2 · 2⤊ 0⤋
different materials can be used to block Ultra violet rays. starting from shade cloths- which acts as a physical barrier, awnings, roofing materials, umbrellas, window glass, and sunscreens. here the concept of sunglasses in UV protection is interesting. they use polaroids. Polaroid filters are made of a special material which is capable of blocking one of the two planes of vibration of an electromagnetic wave. since light is an electromagnetic wave, polaroids are used scientifically to block away UV rays.
2006-07-16 23:55:53 · answer #2 · answered by saurabh k 2 · 0⤊ 0⤋
Almost everything can block UV.
I think the simplest example is normal glass, water is also a good example.
This happens because ultra-violet rays are very energetic, have a small wavelength and so are easily absorbed.
2006-07-17 00:58:27 · answer #3 · answered by mashkas 3 · 0⤊ 0⤋
it starts with clothes and goes down to sunscreen. sunscren either has zinc or titantium oxide. lead isn't included due to toxicity
2006-07-17 04:29:44 · answer #4 · answered by shiara_blade 6 · 0⤊ 0⤋
From children's tears and eagle oil.
2006-07-16 23:29:46 · answer #5 · answered by Anonymous · 0⤊ 0⤋