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Fireworks Effect Twinkling
Need help with a chemistry question about fireworks!?
In fireworks, why do metal flakes create a "strobing twinkle" effect while metal powders create a quick "photo-flash" effect?
Either this is a really, really weird coincidence, or you go to my school and have chemistry right now and are doing the same annoying postlab as me. If so, HI! Who are you, and isn't chemistry at allied really irritating? otherwise, sorry for sounding like a creeper.
I have been looking for this question all weekend, and I think that I might have found the answer. One website tells me this fact:
Finer metal powders react more quickly than coarse powders or flakes.
So, If you ever saw fireworks and saw the kind that twinkle, you obviously see that twinkling effect for much longer than other fireworks that just seem like a quick flash of light. Because the photo flash is made from powders and they react more quickly than the flakes, that explains why you see a "quick photo flash."
Since metal flakes create the strobing twinkle effect and metal flakes take slower to react than powders, that explains why you see that strobing twinkle for much longer than that of the quick photo flash.
I am not absolutely sure, but hopefully my logic sort of makes sense to you. these postlab questions are really, really hard so don't worry i am desperate with a postlab too.
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L688RG Multi effects twinkling laser show system
World's Largest Christmas Tree
Christmas is coming?everybody is very exciting and preparing for Christmas.
In Rio, the world's largest floating Christmas tree was lit amidst a spectacular fireworks display. Despite light showers, thousands gathered along Rio's picturesque lake region to watch the illumination of the 85-metre floating tree.
The largest floating Christmas tree in the world, by Guinness Book standards, is as tall as a 28-story building and attracts 80,000 gawkers a day.
The lighting of the 280 foot tall tree early every December is the party city's third largest event after Carnival and New Year's Eve.
Floating of the coast of Rio De Janeiro, Brazil, the tree literally lights up the sky Created by Brazilian designer Abel Gomes, and sponsored by Bradesco Seguros e Previdencia, the towering display generates 11 sequential patterns, illuminated by 2.9 million miniature bulbs, 52 kilometers of illuminated strands and 1,600 flashing strobes to producing a twinkling star effect.
However rather than raising the town's carbon footprint, light and color display is powered by biodiesel generators that help reduce carbon dioxide (CO2) emissions.
This is another record for Mexico, which already set records this year for the largest group kiss and the largest number of people dancing simultaneously in one place to Michael Jackson's "Thriller."
Mexico is a crazy city?isn’t it?if i am in Mexico?i will participate those positive activities.if you ?
you will be exciting and take part in it?
Have a happy day?
| Most Expensive Christmas Tree |
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happy day！
