Table of Contents
What are the examples of Mie scattering?
Examples of scattering Red colour of sun at sunrise and sunset. White colour of sky at noon. Blue colour of sky. Red colour used as danger signal.
What does Mie scattering effect?
Dust, pollen, smoke and microscopic water droplets that form clouds are common causes of Mie scattering. Mie scattering occurs mostly in the lower portions of the atmosphere, where larger particles are more abundant, and dominates in cloudy conditions.
What is Mie scattering in atmosphere?
Mie scattering occurs when the wavelength of EM radiation is similar in size to particles in the atmosphere. The most important cause of Mie scattering is the presence of aerosols: a mixture of gases, water vapour and dust.
What is the difference between Rayleigh and Mie scattering?
Rayleigh line refers to the unshifted central peak observed in the spectroscopic analysis of scattered light. Mie scattering refers primarily to the elastic scattering of light from atomic and molecular particles whose diameter is larger than about the wavelength of the incident light.
How does Mie scattering affect the way the sky looks?
Mie Scattering This scattering produces a pattern like an antenna lobe, with a sharper and more intense forward lobe for larger particles. Mie scattering is not strongly wavelength dependent and produces the almost white glare around the sun when a lot of particulate material is present in the air.
How does Mie scattering affect remote sensing?
Before radiation used for remote sensing reaches the Earth’s surface it has to travel through some distance of the Earth’s atmosphere. Particles and gases in the atmosphere can affect the incoming light and radiation. These effects are caused by the mechanisms of scattering and absorption.
What is Mie scattering in optical fiber?
Mie scattering is named after German physicist Gustav Mie. This theory describes scattering of electromagnetic radiation by particles that are comparable in size to a wavelength (larger than 10% of wavelength).
Why are clouds white Mie scattering?
Mie scattering occurs when the wavelengths of visible light are approximately, equally scattered. Water droplets, in even small clouds, effectively scatter all wavelengths of visible light in all directions, thus making clouds appear white.
How does scattering affect the satellite image?
The quality of satellite images is affected due to the scattering and absorption of sunlight by atmospheric molecules and aerosols. Aerosols are small particles suspended in the atmosphere which affects the air quality. The concentration and characteristics of the atmospheric aerosols can vary from place to place.
What is Mie scattering Quora?
Mie scattering is caused by particles that are of the same size as the wavelength of radiation. It is predominantly forward. So all radiation tends to reach the earth’s surface and earth becomes warm due to Mie scattering. Dust causes this scattering. I have given only the basic points.
Why scattering is important in remote sensing?
How does scattering influence remote sensing?
Scattering of radiation by the constituent gases and aerosols in the atmosphere causes degradation of the remotely sensed images. Most noticeably, the solar radiation scattered by the atmosphere towards the sensor without first reaching the ground produces a hazy appearance of the image.
Why does scattering occur?
Selective scattering (or Rayleigh scattering) occurs when certain particles are more effective at scattering a particular wavelength of light. Air molecules, like oxygen and nitrogen for example, are small in size and thus more effective at scattering shorter wavelengths of light (blue and violet).
What are the different types of scattering?
There are three different types of scattering: Rayleigh scattering, Mie scattering, and non-selective scattering.
How does scattering influence electromagnetic radiation?
Mie scattering influences longer radiation wavelengths than Rayleigh scattering. The wavelength of Mie scattering is between to . Nonselective scattering: Happened when the lower atmosphere contains suspended aerosols.
What is the Mie scattering theory?
The term Mie theory is sometimes used for this collection of solutions and methods; it does not refer to an independent physical theory or law. More broadly, the “Mie scattering” formulas are most useful in situations where the size of the scattering particles is comparable to the wavelength of the light, rather than much smaller or much larger.
When to use Fraunhofer diffraction theory vs Mie scattering?
Yet, when the particle size is smaller than ten times the laser wavelength, in particular, in measurement in the sub-micron region, the Fraunhofer diffraction theory can no longer be used since a wide-angle light intensity distribution pattern is required. In this case, the Mie scattering theory must always be used.
What is diffusion of innovation theory?
Diffusion of Innovation Theory Diffusion of Innovation Theory Diffusion of Innovation (DOI) Theory, developed by E.M. Rogers in 1962, is one of the oldest social science theories. It originated in communication to explain how, over time, an idea or product gains momentum and diffuses (or spreads) through a specific population or social system.
What is Mie theory in laser diffraction?
Mie theory is often applied in laser diffraction analysis to inspect the particle sizing effect. While early computers in the 1970s were only able to compute diffraction data with the more simple Fraunhofer approximation, Mie is widely used since the 1990s and officially recommended for particles below 50 micrometers in guideline ISO 13320:2009.