It said to use red colur objects as a sign of danger because it is scattered at least and hence can be seen from far?
But if use suppose blue colour bulb in a open area (where no objects to absorb light) , I agree that its rays will not reach us when far because all colour is already scattered and hence we cannt see it.
But why we cannt see even that scattered blue light from far(very) , although we can see scattered light from sky that is much farther than blue bulb?
It is said that during time of sunset or sunrise, appears red as all blue colour is scattered very before, My doubt is why cannt we see that blue colour scattered light? Although it is said our eye can watch at infinity.
Just because scattered light is far, we cannt see it, Can't scattered light reach us from that far?