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dragonlady7via http://ift.tt/2eKiamv:
bewaretheides315:
thebibliosphere:
quandocoeli:
elodieunderglass:
beezelbubbles:
elodieunderglass:
petermorwood:
barackinaroundthechristmastree:
WHAT COLOR ARE MIRRORS
The glass is greener over here. Not a typo.
If you look edgewise through a sheet of glass you see that it’s green because of iron impurities (Google for it). Reducing the iron reduces the green.
Perfectly aligning mirrors to multiply reflections also multiplies the apparent thickness of the glass, and the green tint becomes more apparent the “deeper” each reflection seems to be.
Science is like history: it was never this interesting at school. :-)
Yep! And this is because - I’m sorry to say - mirrors are not a unique or separate substance with magical properties. Mirrors are silvered glass. They have two colors: the color of the silver, and the color of the glass. The “silver” doesn’t have to be silver, though it usually is because mirrors are traditionally made with silver nitrate, because it’s a whitish metal. You can have mirrors silvered in gold or black or red. You take literally any piece of glass, pour a coating of silver on it, seal it, and call it a mirror.
You have to seal it because otherwise it tarnishes and spots. Even though the glass protects it from air, the silver oxidizes just like any other silver, which is why antique mirrors have that funky age-spotted look.
Mirrors used in science are usually pure clear glass with no impurities (so the glass has no color) and are silvered in gold or aluminum, so they are white or gold. A warm-toned mirror would have a pink glass and would make things have a rose-gold look. Phryne Fisher, in the books, has a mirror with pink glass.
(Mirrors silvered in silver - that is, most mirrors you’ve seen - are probably faintly grey from the silver and faintly green from the cheap glass, but it doesn’t need to concern you at all - even if you noticed a strong color, you’re often so used to looking in them that your brain edits out any discrepancy - like how your nose doesn’t get in the way of your vision even though it’s right in front of your eyes all of the time.)
My grandmother had a mirror that was silvered in gold. It was a little disconcerting. The silver in mirrors is why vampires don’t have reflections. (And why the cutlery at Castle Dracula was made of gold.)
IS THAT TRUE ABOUT THE REFLECTIONS BECAUSE IF SO THAT CHANGES ABSOLUTELY EVERYTHING???
@thebibliosphere FYI
Already ahead of you on this one ;)
Film (or, at least, classic gelatin-based type film, the kind you used to load onto movie reels or into the back of your camera) was also a composite of gelatin and silver salts, usually silver halide, which explains why vampires don’t show up on film either.
Sorry for hijacking your very interesting science post with fantasy-science, OP!
bewaretheides315:
thebibliosphere:
quandocoeli:
elodieunderglass:
beezelbubbles:
elodieunderglass:
petermorwood:
barackinaroundthechristmastree:
WHAT COLOR ARE MIRRORS
The glass is greener over here. Not a typo.
If you look edgewise through a sheet of glass you see that it’s green because of iron impurities (Google for it). Reducing the iron reduces the green.
Perfectly aligning mirrors to multiply reflections also multiplies the apparent thickness of the glass, and the green tint becomes more apparent the “deeper” each reflection seems to be.
Science is like history: it was never this interesting at school. :-)
Yep! And this is because - I’m sorry to say - mirrors are not a unique or separate substance with magical properties. Mirrors are silvered glass. They have two colors: the color of the silver, and the color of the glass. The “silver” doesn’t have to be silver, though it usually is because mirrors are traditionally made with silver nitrate, because it’s a whitish metal. You can have mirrors silvered in gold or black or red. You take literally any piece of glass, pour a coating of silver on it, seal it, and call it a mirror.
You have to seal it because otherwise it tarnishes and spots. Even though the glass protects it from air, the silver oxidizes just like any other silver, which is why antique mirrors have that funky age-spotted look.
Mirrors used in science are usually pure clear glass with no impurities (so the glass has no color) and are silvered in gold or aluminum, so they are white or gold. A warm-toned mirror would have a pink glass and would make things have a rose-gold look. Phryne Fisher, in the books, has a mirror with pink glass.
(Mirrors silvered in silver - that is, most mirrors you’ve seen - are probably faintly grey from the silver and faintly green from the cheap glass, but it doesn’t need to concern you at all - even if you noticed a strong color, you’re often so used to looking in them that your brain edits out any discrepancy - like how your nose doesn’t get in the way of your vision even though it’s right in front of your eyes all of the time.)
My grandmother had a mirror that was silvered in gold. It was a little disconcerting. The silver in mirrors is why vampires don’t have reflections. (And why the cutlery at Castle Dracula was made of gold.)
IS THAT TRUE ABOUT THE REFLECTIONS BECAUSE IF SO THAT CHANGES ABSOLUTELY EVERYTHING???
@thebibliosphere FYI
Already ahead of you on this one ;)
Film (or, at least, classic gelatin-based type film, the kind you used to load onto movie reels or into the back of your camera) was also a composite of gelatin and silver salts, usually silver halide, which explains why vampires don’t show up on film either.
Sorry for hijacking your very interesting science post with fantasy-science, OP!
