No not at all.
Rastafarians created them ;)
There's nothing really special here, it's simply the color of the light that enters our eyes is how we see the traffic light.
red, yellow,green
the colors of Saturn are a light brown and white There is a picture of the colors in the related links.
The Traffic Light Eating Plan follows the Food Guide Pyramid. Each food group can be split into groups based on the colors of the Traffic Light. There are GREEN foods, YELLOW foods, and RED foods.
Duuu they're both colors! :P
The Traffic Light Eating Plan follows the Food Guide Pyramid. Each food group can be split into groups based on the colors of the Traffic Light. There are GREEN foods, YELLOW foods, and RED foods.
Check out the related link to get a theoretical overview of the operation of traffic lights.
Because there would be no secondary colors without primary colors mixing together.
is just a symbol to show you when to go on and when to stop. usually the sequence of traffic signal light is red--NO cross; Yellow --warning; Green --cross. The three colors appear in turns.
Yes; Traffic lights change colour on average every three to five minutes. Just stand at any traffic junction!
No. All colors of light travel at the same speed in vacuum. Different colors represent light waves with different wavelengths (frequencies).