Why we can see cone of white light (not blue) from torch in night but not in day light?

Question

Why we don't see blue colour when we look forward in a open ground, sunrays are there and gases are there. Then why it is not appearing blue like sky but white?

Also when I turn on a torch in day light its path is not visible when looking from side. But in night if we turn on torch, we can see a cone like structure while looking from side, why don't we see a bluish cone as white light scatter blue the most in atmosphere, instead we see white light! Why?

Similarly, How red Cone of light house is visible from side in night but not much in day time?

Answer 1

At night, if you had sensitive enough equipment, you could see the blue component of the white light from the torch.

I would guess that the light coming out of a torch simply does not have an intensity high enough (and shining over a large enough area), so that the blue component of the light is clearly visible. In other words, you would need a significantly large number of light scattering events over a large area so that you would see significant amounts of blue light visible to the naked eye.

When you see a cone light structure coming from the torch, it is usually because of dust particles in the atmosphere reflecting the light.

When a torch is on during the day, you also need to remember that there is also plenty of light from the sun, whose brightness will outshine the light coming from the torch. This is similar to why you cannot see stars during the daytime.

Answer 2

In the first case, you aren't looking closely enough. It does appear blue.

2nd: Water is also colored blue, slightly, but a small cup of water looks perfectly clear. In fact air has more or less the same properties as water would if it was 1000x less dense.

3rd: When you shine a torch on a surface it's visible, but when you shine it on a surface that's already lit more brightly it isn't. Likewise with the scatter from a cone of light.