2007-02-13 04:59:05 · 10 answers · asked by micknodlew 1 in Science & Mathematics ➔ Earth Sciences & Geology
The yellow color in the sand and the green color in the glass are both due to iron compounds. But in the sand, you are seeing the color (orangish) that the iron reflects, while in the glass you see the color that it transmits.
High-purity silica is highly transparent, and is used for fiber optics for that reason. However, very slight levels of impurity will absorb some of the light. The part of the spectrum absorbed by the impurity determines the color of the glass - if red light is absorbed, the glass looks blue, for example.
2007-02-13 05:26:50 · answer #1 · answered by injanier 7 · 1⤊ 0⤋
Pure silica sand isn't yellow...ergo, your question has a basic flaw. The yellow of most beach sand is from impurities and oxides which, of course, are removed before making glass.
2007-02-13 15:50:37 · answer #2 · answered by Anonymous · 1⤊ 0⤋
The green tone is due to molecules including iron in the definite structure that the glass gets once melted and cooled. If you want a more transparent material, you have yo use raw materials which are Iron-free (actually extremely low Iron).
2007-02-14 21:40:36 · answer #3 · answered by Andrés P 1 · 0⤊ 0⤋
I used to work in a glass factory and the glass is clear unless they roll it in a colour, ie green, blue, pink etc.If the objct is to stay clear then they do nothing else with it but if the piece is coloured then the glass is gathered and then dipped in the colour and then heated again in the heat and then another clear gather of glass is added to seal the colour....then the piece is blown or moulded.
2007-02-13 13:17:49 · answer #4 · answered by kazza 3 · 0⤊ 0⤋
because once the sand is melted it takes on a different chemical so it turns blueish green or clear
2007-02-13 13:01:25 · answer #5 · answered by chkn_fur 5 · 0⤊ 0⤋
I believe that thier is a chemical transformation
that takes place at a high rate of temperature
so therefore the change !
2007-02-13 13:02:55 · answer #6 · answered by rottentothecore 5 · 0⤊ 0⤋
it depends on the state of silica ....means that to which extent it is melted and also some other impurities (other chemicals ) are also added
2007-02-13 14:27:48 · answer #7 · answered by saira khan 2 · 0⤊ 0⤋
the green color is actually iron impurites in the silica.
when heated and melted, the iron turns the glass greenish.
tc
2007-02-13 13:02:40 · answer #8 · answered by timc_fla 5 · 0⤊ 0⤋
Colourants added to get the desired effect.
2007-02-13 13:07:11 · answer #9 · answered by catsmeatuk 4 · 0⤊ 0⤋
hmm, isn't glass clear unless dye is added?
2007-02-13 13:02:45 · answer #10 · answered by Tori 2 · 0⤊ 0⤋