What color of light is scattered least by dust?
Rayleigh scattering states that the longer the wavelength of radiation, the less it is dispersed. The higher the scattering, the shorter the wavelength of light; this is why blue or violet light scatters the most and red light scatters the least.
Since the wavelength of red light is longest in white light so it will scatter the least.
The Short Answer:
Blue light is scattered more than the other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time.
So, red color light is scattered the least, while blue color light is scattered the most.
White. White cars are one of the most common on the road because of their clean look. There's a good reason for that! They're excellent at concealing dust, grime, and water stains—as long as you're not driving on dirt or red clay roads.
Dust particles suspended in the atmosphere are much larger than the wavelength of visible light. Thus, when sunlight falls on larger particles, sunlight appears white.
Because red light has the longest wavelength of all visible light colors, it is the least dispersed.
The Correct Answer is Option 1 i.e Red. The red light has the largest wavelength among all visible parts of light and so it is scattered the least by the fog of smoke. Scattering of light is more effective in blue, yellow, and green due to their shorter wavelengths.
In Rayleigh scattering, the efficiency of scattering is inversely proportional to the fourth power of the wavelength. Red light has double the wavelength of blue light, and is therefore scattered 16 times less.
The scattering of light from dust depends on the wavelength. Short wavelengths bounce off of dust grains more easily than long ones. Therefore more blue light scatters from dust than red light. The blue color of our sky is due to sun light which scatters from dust in the atmosphere.
Which of the following colour is least scattered by fog dust and?
(P) The red coloured light scatters least by fog or smoke.
Violet and blue light have the shortest wavelengths and red light has the longest. Therefore, blue light is scattered more than red light and the sky appears blue during the day. When the Sun is low in the sky during sunrise and sunset, the light has to travel further through the Earth's atmosphere.
Red color light has a maximum wavelength and hence is scattered the least.
The danger signals are red in colour because it is least scattered by fog or smoke.
So if you are a new furniture painter, why not try a more simple color, like gray, blue, green, or even cream? All of those colors paint so much easier–they cover better than white and don't show off dirt and dust like black.
So, which color should you want for your next car, white or black? White is the most common car color today, and most people believe that it shows dirt quickly, because it is white. Nothing can be further from the truth. Black cars have proven to be hardest to keep clean.
Assertion :Sky appears blue. Reason: Colloidal particles of dust scatter blue light.
Tyndall Effect:
The phenomenon of scattering of light by dust, particles, smoke and water droplets suspended in air in colloidal form is known as “Tyndall effect” or “Tyndall Scattering”. It was first explained by John Tyndall in 1859.
The small particles (molecules, tiny water droplets and dust particles) scatter photons the more, the shorter their wavelength is. Therefore, in the scattered light, the short wavelengths predominate, the sky appears blue, while direct sunlight is somewhat yellowish, or even reddish when the sun is very low.
Gases and particles in Earth's atmosphere scatter sunlight in all directions. Blue light is scattered more than other colors because it travels as shorter, smaller waves.
Which of the following Colours is least scattered by fog dust or smoke and is also used to indicate danger?
The danger signals are red in colour because it is least scattered by fog or smoke.
Namely, dust particles can block much of the visible and UV light emitted from stars. Imagine the sun on a foggy day; it looks dimmer than it would on a sunny day. The reason is that particles in the air have blocked some of the sunlight.
The Black colour does look appealing on the car but comes with heavy maintenance. Dark colour cars seem to attract more dust and bird poop than any other colour. Also, scratches and dents look much more pronounced on a darker colour than on a light colour.
The IR band differencing allows dust storms to be observed during both daytime and at night. Dust appears pink/magenta during the day and can vary in color at night depending on height. Dust is also distinguishable in the RGB from land surfaces like deserts as well as oceans, given sufficient thickness/density.
Very fine particles scatter mainly blue light while particles of larger size scatter light of longer wavelengths. If the size of the scattering particles is large enough then the scattered light may even appear white.