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red light has a longer wavelength so it does not get scattered easily and can cover a long distance thus reaching a far observer in case of a traffic signal or as a danger signal.
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∙ 13y ago
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Two of this elements compounds burn with a red flame and are used in fireworks and signal flares?
Lithium, strontium and calcium have red flames.
The one blood type that could be used without danger of antibodies clumping its red blood cells is?
O positive.
How is the light used in lasers?
They just use a red light they put it in side and there you go kinda like a flash light i guess
What color does yellow and pink make?
Red. I tried it once myself with markers. I used my pink with a light yellow and made red.
Why is infra-red radiation rather than visible light used with optic fibers?
Infra-red has less energy the visible light, and so it takes less energy to create.
Why is red light used as a universal danger signal?
It comes from the fact that our blood is red. If you cut yourself, you bleed - which could be life-threatening if not treated.
Why rad light used in traffic light?
To humans RED means stop or danger in our brains.
Why are the red signal are use for danger situation when green and yellow are most sensitive for eye?
It is because I think red light doesn't disperse in foggy situations and can be seen from a distance.
Why the red color light is used as sign of danger and not the yellow?
Danger can result in bleeding, and blood is red in color. Yellow has no such associations; it is associated with sunshine and buttercups.
Why is red light used in traffic signals?
Red color is uesed for stop traffic signal bcos the red color having the highest wavelength.so, it is visible from the longer distance even in foggy atmosphere as compared to the other spectrum colors
Why does the light house at sea beach uses red light?
red is a sign for danger
What does blinking red light mean?
Blinking red light signifies alertness or danger.
Why are most road signs red and white in colour?
white is the colour which we can see from the maximum distance and red is a alert signal or danger signal and has good reflections also.
What is a 'SPAD' on the railroad?
SPAD = Signal Passed At Danger I.e. the train did not stop at a red signal, but carried on some distance further.
What does a red light indicator stands for?
Stop, Danger
What are led lights for?
Red is the universal sign of danger or warning. You must be more specific as to WHERE and under WHAT circumstances the red light you are referring to is bieng used.
What is the music used on the Sky Sports darts Champions trailer advert?
Billy oceans red light spells danger.
