Penetration depth is a measure of how deep light or any electromagnetic radiation can penetrate into a material. When electromagnetic radiation is incident on the surface of a material, it may be partly reflected from that surface and there will be a field containing energy transmitted into the material. This electromagnetic field interacts with the atoms and electrons inside the material.
When I use the term lightyou are used to thinking of the light emitted by a bulb that you can sense with your eyes, which we now know consists of many wavelengths colors of light from red to blue. As I mentioned briefly before, radio waves are also light waves. Infrared radiation is a kind of light wave usually abbreviated as IR.
Remember Me? Forum Digital Design and Embedded Programming Digital communication What is the more penetration into the objects, low frequency. What is the more penetration into the objects, low frequency.
We are all familiar with sound. It helps us to communicate and listen to gossip. Audible alarms warn us and pulse oximeters sing saturations to us.
All wireless communication systems, including cell phones and two-way radios, operate on what is known as operating frequency. The government regulates these frequencies and the equipment used to communicate through them. Since people need all different types of radio signals a variety of wireless equipment is necessary to satisfy all needs.
For m, a higher exponent decreases the penetration a,c,e. The value of strongly influences the penetration of waves b,d. The slope break in the attenuation curve f determines the frequency below which our scattering model is valid. Scattering attenuation is proportional to at low frequencies and corresponds to the Rayleigh diffusion regime.
Radio waves are EM Electromagnetic waves that have wavelengths between 1 millimeter and kilometers or GHz and 3 kHz in frequency. Radio waves are a type of electromagnetic EM radiation with wavelengths in the electromagnetic spectrum longer than infrared light. They have have frequencies from GHz to as low as 3 kHz, and corresponding wavelengths from 1 millimeter to kilometers.
Articular cartilage is a hyaline cartilage that lines the subchondral bone in a diarthrodial joint. Near infrared NIR spectroscopy has been emerging as a nondestructive modality for evaluation of cartilage pathology. However, studies of the depth of penetration of NIR radiation into cartilage are lacking.