how can I get a rainbow in a bottle?
412309
Get hooked on Heroine... you'll see a whole bunch of other stuff that completely kicks azz on a stupid rainbow, like mutated giraffes and purple dinosours!
902905
Ok. this is simple. u need to know about buyoancy, like how air is lighter than water. all you really got do is put some small weights (ex. paper clips, rocks, etc) in the bottle. have it so that it will just barely float. then cut a hole to the side and insert the end of a tube in it. make sure it is water tight. then place it in a tub. it shold float, when you suck on the end of the tube, it should take some of the air out making it less buoyant, and therefore it will sink. there are also many other ways to do this that will make it function more like a real submarine like putting the bottle with weights inside and somehow add pressure to the the outside of the tube to compact the air inside the bottle, causing it to sink. good luck on your project
942352
A rainbow is an optical and meteorological phenomenon that causes a nearly continuous spectrum of light to appear in the sky when the Sun shines onto droplets of moisture in the Earth's atmosphere. It takes the form of a multicoloured arc, with red on the outside and violet on the inside. A double rainbow includes a second, fainter, arc with colors in the opposite order.\n\nEven though a rainbow spans a continuous spectrum of colours, traditionally the full sequence of colours is most commonly cited as red, orange, yellow, green, blue, indigo and violet. It is commonly thought that indigo was included due to the different religious connotations of the numbers six and seven at the time of Isaac Newton's work on light, despite its lack of scientific significance and the poor ability of humans to distinguish colours in the blue portion of the visual spectrum.\n\nScientific explanation\n\nThe rainbow effect can be observed whenever there are water drops in the air and sunlight shining from behind the observer at a low altitude or angle. The most spectacular rainbow displays when half of the sky is still dark with draining clouds and the observer is at a spot with clear sky overhead. The rainbow effect is also commonly seen near waterfalls or fountains. Rainbow fringes can sometimes be seen at the edges of backlit clouds and as vertical bands in distant rain or virga. The effect can also be artificially created by dispersing water droplets into the air during a sunny day.\n\nIn a very few cases, a moonbow, or night-time rainbow, can be seen on strongly moonlit nights. As human visual perception for colour in low light is poor, moonbows are most often perceived to be white.\nRainbows may also appear in the spray of a water fountain\nEnlarge\nRainbows may also appear in the spray of a water fountain\n\nThe rainbow's appearance is caused by dispersion of sunlight as it is refracted by (approximately spherical) raindrops. The light is first refracted as it enters the surface of the raindrop, reflected off the back of the drop, and again refracted as it leaves the drop. The overall effect is that the incoming light is reflected back over a wide range of angles, with the most intense light at an angle of about 40°–42°. This angle is independent of the size of the drop, but does depend on its refractive index. As seawater has a higher refractive index than rain water, the radius of a 'rain'bow in a sea spray is smaller than a true rainbow. This is visible to the naked eye by a misalignment of these bows [1].\n\nSince the water is dispersive, the amount that the sunlight is bent depends upon the wavelength, and hence colour, of the light's constituent parts. Blue light is refracted at a greater angle than red light, but because the area of the back of the droplet has a focal point inside the droplet, the spectrum crosses itself, and therefore the red light appears higher in the sky, and forms the outer colour of the rainbow. Contrary to popular belief, the light at the back of the raindrop does not undergo total internal reflection; however, light that emerges from the back of the raindrop does not create a rainbow between the observer and the Sun. The spectra emitted from the back of the raindrop do not have a maximum of intensity, as the other visible rainbows do, and thus the colours blend together and do not form a rainbow.\n\nA rainbow does not actually exist at a location in the sky, but rather is an optical phenomenon whose apparent position depends on the observer's location. All raindrops refract and reflect the sunlight in the same way, but only the light from some raindrops reaches the observer's eye. These raindrops are perceived to constitute the rainbow by that observer. The position of a rainbow in the sky is always in the opposite direction of the Sun with respect to the observer, and the interior is always slightly brighter than the exterior. The bow is centred on the shadow of the obser
235740
Use toothpicks and colored gumdrops.\n\nChoose a color for: protons, neutrons, and electrons.\n\nThen use the colored gumdrops to represent them. for example, use 2 blue gumdrops for the protons, 2 red gumdrops for the electrons.\n\nthen connect them using the toothpicks- so end result is it looks lke an atom with te protons in the middle (nucleus) and electrons on the outside.
329385
A rainbow is created when white light from the sun enters droplets of water in the sky and is refracted. The light is refracted when entering spherical droplets, then it is reflected inside them and refracted again upon leaving. This bends the light, as you would see in a lens.  The red end of the spectrum bends less than the blue, which is why they separate when they come out of the drop.\nWikipedia has a page about rainbows, with some diagrams which may help you understand.\nhttp://en.wikipedia.org/wiki/Rainbow
32450
Yes.  You can form a supersaturated solution with salt and boiling hot water in a glass jar.  Tie a pencil to one end of a string and a paperclip to the other.  Allow the pencil to rest on the top of the jar so the paperclip can hang in the solution, almost touching the bottom of the jar.  Allow the jar to sit undisturbed and you'll see crystals forming within 24 hours.
318480
Yes it is rainbow. Here is the Russian spelling of it: "радуга"
259893
It cant be just any piece of glass, it has to be a prism. The light comes out in the form of a rainbow because the prism separates the light into it's visible colors.
416298
A full moon can form a rainbow - usually called a "moonbow". It looks kind of grey though.
961441
Rainbows are always the same size.  The diameter of a rainbow is best expressed in degrees as it is not at a fixed distance away.  Rainbows can be thought of as occupying the surface of a thin cone with its pointy end at your eye, and the angle of the cone is fixed.  This angle depends only on the refractive index of water.\n\nYes - you can get one bigger than a semi-circle, but only if you get well above the earth's surface (perhaps in an aeroplane) so that the ground doesn't get in the way!
837694
Bottle Rockets with Water. You can test for how high to get the rocket to go, like amount of water to amount of pressure in the bottle. Its a fairly cheap thing to do, you just need an open field. you need data tables and record keepers. you need atleast 2people on this, 3 would make it alot easier.
52478
When light is refracted off of droplets of water it enables you to see all the colors that make up white light (sunlight, even light from bulbs.) creating what people more commonly refer to as a rainbow. \n  Go outside on a sunny day and spray the waterhose if you have one. If you look very carefully, you can see that the rainbow you created is not just a semi-circle, but a full circle! The bottom half is harder to see, but it is there. The reason rainbows don't look like that when we see them outside is because we are too low to the ground to see the rest.
159623
You may not realize it but in one qhestion you have asked for knowledge that is gained taking a university level physics course.\n\nSince I am a lousy typist, I will give you some clues that should allow you to visit Google and gather the answers you are looking for.\n\nThere are twi type if color mixing.  The additive method, used by painters, where you mix yellow and blue to get green.  \n\nThe subtractive method, used in optivs and video technology, where colors are filtered out as opposed to added in.  In this method the primary color are differet.\n\nIf you want a much more thorough explanation, you may want to examine the study of "Chromatics".  At look at how rainbows are created might help as well.\n\n\nBest of luck,\nJeffrey
257450
No. It's how light reflects and refracts inside of each droplet. The inside rainbow has a different number of reflections internal to the raindrop than the outside rainbow does, so you get a different angle. It turns out that every drop, no matter what the size, has the same angles of refraction and reflection (as long as the raindrop is spherical), so the 42 degrees is reliable across different drops.
1019043
If you go to gofish.com or myspace.com there is a video about this.  Apparently it is a matter of breaking the surface tension.  They used only 2L bottles but I think it will work with other sizes.  Not only mentos and diet coke works, but they used diet pepsi, with same results.  It even works with dropping rocks in the bottle.  It was a really awesome video, it was quite funny.  I suggest checking it out.
30314
there is a type of dye sold at Wal Mart and other general department stores like that called RIT and you use it in the wash cycle. It works fairly well and isnt very expensive. There are directions on the bottles for the way to go about it. Try it out! Good luck!
557311
hmmmm, my bubles have all the colors of the rainbow.\njust need to look closely. a beauty, those colors are slowly flowing over the surface of the bubble, ....then i pop the bubble, muahahahaha.