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why danger signals are made of red colours

since the wavelength of red light is the longest in visible light ... the red colour light is scattered the least by air molecules of the atmosphere and therefore it can reach to a longer distance .. thus red light can be seen from the farthest distance as compared to other colours ...... Hence, it is used as danger signal ...

Hope this helps !!

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Red colours have high wavelengths. They are not easily scattered by Fog or dust  or water molecules.

So they become visible to us from a long distance , so that we can take preventive steps.

Cheers!!Thumbs up please!

  • 108

I think the major reason has to do with how light gets absorbed in fog, 
particulates, haze, etc.
We know that light is scattered (and thus attenuates or gets weaker) as it 
travels through a scattering medium composed of small particles.

As it turns out, red light is scattered (is weakened) less than other 
colors. In fact, of the light spectrum, blue is scattered the most and red 
the least.

red light weakens the least in traveling in the air. That is 
why stop signs and other critical lights are red.

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 Danger signals are red in colour due to the following reasons-

1.It has the highest wavelenght in all colours and due to its property it is visible from far distance

2.It is least scattered by fog,cloudy weather and translucent situations

hope u got it!!!!!!

  • -2

because the wavelength of red colour is the highest and hence it can travel longer distances. therefore, people at a distance v.far from the danger signals can also see and get aware .

Always remember, if the wavelength is more then it will travel more distance and if it is less it will travel lesser distances

therefore speed of light is directly proportional to wavelength.

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The primary reason why the color red is used for danger signals is that red light is scattered the least by air molecules. The effect of scattering is inversely related to the fourth power of the wavelength of a color. Therefore blue which has the least wavelength of all the visible radiations is scattered the most and red which has the highest wavelength of all the colors we can see is scattered the least. So red light is able to travel the longest distance through fog, rain, and the alike.

Also, red is a color we inherently perceive as one that is associated with danger. I guess it has been genetically programmed as hot objects are red in color and also red is the color of blood. These reasons make danger signals the most effective when they are painted in red.

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The primary reason why the color red is used for danger signals is that red light is scattered the least by air molecules. The effect of scattering is inversely related to the fourth power of the wavelength of a color. Therefore blue which has the least wavelength of all the visible radiations is scattered the most and red which has the highest wavelength of all the colors we can see is scattered the least. So red light is able to travel the longest distance through fog, rain, and the alike.

Also, red is a color we inherently perceive as one that is associated with danger. I guess it has been genetically programmed as hot objects are red in color and also red is the color of blood. These reasons make danger signals the most effective when they are painted in red

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a simple answer is dat the red is least scattered by fog, smoke and dust particles due to it's high wave length.

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danger signals are made of red colour because red colour has high wavelength and thus is least scattered.moreover it also has high velocity .thus it will be least scattered in fogs and dust

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danger signals are made of red colour because red colour has high wavelength and thus is least scattered.moreover it also has high velocity .thus it will be least scattered in fogs and dust

  • 4

Red colour has highest wavelength and high velocity.so is use in the signal of Danger.

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why is red light used as universal danger signal ?
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red colour is highest wave lenght,  red is symbol of danger, red colour is used in signals because red colour travel through fog  and dust and water molecules, it can not scatter through the objects, red is ease travel to long objects.  
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As red is the least scattering colour therefore can be seen from  far point..
                                                                                                              hope it helped you
  • 4
The wavelength of red colour is longer among the other colours and it is scattered least while passing through atmosphere and therefore,travels large distance and can be seen from large distance.Hence ,the danger signals make use of red light.
  • 4
As it scatter less and cover a larger wavength

  • -22
The primary reason why the color red is used for danger signals is that red light is scattered the least by air molecules.The effect of scattering is inversely related to the wavelength of a color. Therefore blue which has the least wavelength of all the visible radiations is scattered the most and red which has the highest wavelength of all the colors we can see is scattered the least. So red light is able to travel the longest distance through fog, rain, and the alike.
Also, red is a color we inherently perceive as one that is associated with danger. I guess it has been genetically programmed as hot objects are red in color and also red is the color of blood. These reasons make danger signals the most effective when they are painted in red.
  • 3
The reason why the danger signals are red in colour is that red light is scattered the least by the air molecules. The effect of scattering is inversely related to fourth power of wavelength of colour . hence red light can travel long distance as compared to other light.
  • 3
Red colour have high wavelength.They are not easily scattered by fog or dust or water molecules.So,they become visible to us from a long distance so that we can take preventive steps.😎🤘✌
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wht whou
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Danger signals are red in colour bcoz the red coloured light having max. wavelength is scattered the least by fog or smoke. ☺
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This is because the red coloured light having longer wavelength is the least scattered by fog or smoke particles. Due to this the red light can be seen in the same colour even from a distance.
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red is least scattered
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Red has the longest wavelength so it scatters the least and it can penetrate to a longer distance. Thus it can be seen from a longer distance.
  • 0
they aren't easily scattered
  • 0
Red colour has a high wavelength and is visible in dark colours easily....
  • -2
The primary reason why the color red is used for danger signals is that red light is scattered the least by air molecules.
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The primary reason why the color red is used for danger signals is that red light is scattered the least by air molecules. The effect of scattering is inversely related to the fourth power of the wavelength of a color. ... So red light is able to travel the longest distance through fog, rain, and the alike.
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