What is differential absorption?

differential absorption is a phenomenon where a substance with mixed components absorbs and reflects radiation at different speeds due to a different composition of ingredients. A classic example can be seen in X -ray imaging, where the doctor can take a picture of the patient's body by radiation to detect the film. The body structures are visible on the film because they absorb X -rays to different degrees; For example, the bone absorbs many X -rays, and therefore the film is left to show the patient's bones.

Medical display is not the only field where differential absorption is useful. It can also be useful in activities such as measurement of atmospheric gases, studying distant events in space and analysis of land and rocks. In all these cases, people rely on the fact that materials absorb and reflect radiation at different speeds to collect data.

Technician can adjust the cleanliness and quality of the image using different types of radiation or by changing the intensityyou. In medical imaging, people must achieve a balance between good image and patient threat. For example, for X -ray imaging, a higher resolution can be obtained, but this would expose the patient an unacceptably high level of radiation. Scientists using the advantage of differential absorption must also consider the effects of radiation on the experiment.

In physics, scientists use differential absorption with techniques such as light and scope detection (Lidar) to learn more about the composition of the atmosphere. This includes shooting pulses of light into the area of ​​interest and reading the reflected light on its return. Some gases in the atmosphere absorb light, while others will reflect and the amount of scattering that is present present with ASES. They can compare data from other websites and study topics such as ozone layer, meteorology and effects of pollution on the atmosphere.

in soil sciences and geology may be differential absorptione useful way to collect data on what is happening under the surface of the Earth or Ocean. Archaeologists also use this technique to study buried places. Most often, this includes the use of a device that makes sound waves. The device passes through the surface and reflected sound waves tell the technicians that lie below because things like rock formations, shipwreck or buried buildings will reflect sound waves at different speeds than the soil. Different types of soil will also have different reflection formulas.