Red sky at night, sailor’s delight. Red sky in morning, sailor’s warning," as the old saying goes. But what about glowing, hazy red skies at both sunrise and sunset? They could be a sign of poor air ...

It is a phenomenon called "Rayleigh scattering"—the dispersal of light particles within a medium without any changes to the wavelength. It is this process that makes the sky blue, as blue light ...

2. With the fiber Rayleigh scattering obtained by the deep learning model, the optimal probe pulse can be estimated beforehand, and then the time-domain responses of the sensing signal can be ...

Through precise analysis of the phase fluctuations of Rayleigh scattering in fibers using a phase-sensitive optical time-domain reflectometry (phi-OTDR) with proprietary technologies, a Rayleigh ...

Why do we get beautiful colors at sunrise and sunset? The color of the sky we see every day is caused by something called Rayleigh scattering. The light from the sun contains all the colors of the ...

Per NASA, the color of the so-called "Blood Moon" is caused by the same phenomenon that makes our sky blue and our sunsets red: Rayleigh scattering. Earth's atmosphere scatters away shorter ...

Keran Deng, Kai Wei, Kai Jin, Ruoxi Dong, Min Li, Yudong Zhang, A Hybrid Pulsed Rayleigh-sodium Laser Guide Star Adaptive Optics System for Strong Turbulence Observations, Publications of the ...

The technique operates in the ultraviolet region, using Rayleigh scattering from gas molecules in the air passing over a laser-illuminated area. “Applied to a turbofan engine, the light is provided by ...

where I (q,c) is the excess Rayleigh scattering ratio (in units of cm -1), the quantity assessed by the light scattering instrument, identical to its value from the polymer solution subtracting ...