why are telecommunication towers always painted in red and white ?
349893
So you can tell how tall they are, and so they're more visible from higher altitudes.  No joke, each section of 20 feet (in America at least) is red or white, and that way they don't blend into the sky the way steel blends into the clouds.
237515
Two supplementary colours give together the impression of white. Use a magnifying glass on your coloured t.v. screen and look at white places.
1077289
The red balls collect static electricity in the air and eliminates even the slight possibilities of shorthing two separate wires that could cause a massive blackout in the region.\nThe gray balls emit high frequency sounds that are very disturbing to the birds so that the birds do not sit on the wires and short them.\nBoth colors have transmitters that alert the pilots that fly by also.
1068651
White reflects light at *visible* wavelengths better.\n\nHowever, the designers were not trying to reflect visible light.  I would guess they designed the coating to emit thermal radiation as efficiently as possible - approaching 'black-body'.  The coating color would probably be secondary to that consideration.\n\n****\nSide Note\n*****\nDue to it's tremendous speed, the orbiter shock-heats air at it's leading surfaces during reentry. (the orbiter's underbelly is exposed directly to the 'wind stream', if you will, due to the orbiter's initial high-angle of attack)\n\nThe temperatures of the thermal protective surfaces rise primarily in response to thermal radiation from the incandescent shockwave.  NOT FROM FRICTION.
1033883
because they choose that color
892352
You need red and white material. Take a look at the picture.
60254
Since this answer is supposed to not necessarily have anything to do with fact, how about this...\nSince the red cross is a symbol of neutrality and medical treatment in war, the red symbolizes the blood that has been lost by the soldiers that the doctors are trying to or have failed to save, while the white background represents the purity of neutrality. The cross was simply chosen to highlight the goodness of this Christian action, hence the Red Crecent being used in many non-Christian nations.
601948
Originally a spectrum was what is now called a spectre, i.e., a phantom or apparition.\n\nWhen white light is passed through a prism, colours 'appear' as if from nowhere, so this is where the link comes from
649136
red and blue while playing at home. all white while playing abroad.
776710
they make colors usually white stand out more. if you have glow in the dark stuff it will make that stand out too
506252
because white is the Miami team color!!  lol\n\nby the way, cute pix!!  =D
622473
Red, because it is a live color. Outgoing!
7937
Ferric oxide (rust), a primary component of red paint, is inexpensive and originally this appealed to the thrifty farmers of New England and New York State. Red is the predominant barn color in that region. Natives of these areas were the early settlers of the Great Lakes states migrating there via the Erie Canal and the Lakes. The early settlers brought their red barn tradition (and thriftiness) with them, and this was followed by the later immigrants who came directly from Europe.\n\nI have also heard that barns were originally painted red because back in pioneer days there wasn't much choice. Farmers used to make their own mixture, consisting of a nauseating blend of skim milk, lime, linseed oil, and iron oxide, better known as rust. "Hmm," said the anonymous inventor of this concoction, "this is not the milkshake I hoped it would be. But it might make a pretty good paint." \nIt was even so. The mixture hardened quickly and wore well. The red color was a side product of the iron oxide. After the advent of Sears Roebuck and modern factory-mixed paint, barns stayed red in order not to disappoint the tourists.
590915
They do it to make it look tidy and fancy. It is supposed to add to the ambiance.
89948
The black and white are different colors...the other two come from different countries. You have me on that pesky "why" question though!!!
723740
White clothes always project a sense of purity, cleanliness. It's only natural that chefs and doctors would want to wear white for the sake of their customers.
984639
yellow, red, green for road signs and advertisements....those colors wouldn't be very good choices for rooms though.  Rooms would be popular with soft colors such as off white, pale pastel colors.