Radiographs are produced through the use of radiation. There are three different types of radiation. These include PRIMARY RADIATION, REMNANT RADIATION, and SCATTER RADIATION. Primary is the radiation that leaves the tube, remnant is the “exit radiation” that passes through the image receptor, and scatter has less energy as primary but is less controlled. The patient is the primary source of scatter and causes the unnecessary exposure of radiation known as SCATTER RADIATION FOG. The radiographs…
Please 1) describe what is meant by the terms short-wave and long-wave energy, 2) namea specific type of electromagnetic energy for each type, and 3) correctly identify which is associated with the energy emitted from the Sun and the Earth. Short-wave electromagnetic energy has a short wavelength and high energy, while long-wave electromagnetic energy has a long wavelength and low energy. The wavelendth refers to the sine function that describes the eneregy's osicalation through time. Higher…
Advancement in Radiation Protection: Non-Lead Apron People are exposed to radiation every day just by being alive on this earth. One receives approximately 3,000 µSv of ubiquitous background radiation a year, which means approximately 8.2 µSv per day (Howerton, Iannucci, 2012). This is known as background radiation and is caused by terrestrial, cosmic, and naturally occurring radon. On the other hand, during radiographic examination some degree of biological damage does occur during exposure,…
Scientists have the ability to determine the molarity and the contents of a substance by measuring the intensity of the light that is emitted through the solution. Scientists accomplish this by using the technique of spectroscopy; spectroscopy can be defined as the science affiliated with the spectra produced when matter interacts with light. Lab 7 investigation 19, “What Factors Affect the Intensity of Color?” expands on the process of spectroscopy, and its relation to the molarity of a…
All Colors of the Visible Spectrum Grow Salvia Splendens More Efficiently than Red or Green Light on Its Own By: Diego Prado, Morgan Miller, Cody Holland, and Jonathan Ruppel Introduction The hypothesis for lab 5 was that plants that do not receive red light will perform photosynthesis less efficiently than those exposed to light of all wavelengths. The findings for that lab were that the plant that received all colors grew the most. The experiment was done again, but this time the algae was…
Rosseland Radiation Model The Rosseland Model (Diffusion approximation model) is applicable when the medium is optically thick i.e. the optical thickness is much greater than 1 where a is the absorption coefficient of the medium, σ is the scattering coefficient of the medium and L is the average path length. The radiative heat flux is approximated as [3], (2.13) where qr is the radiative heat flux, Γ is the radiative diffusivity and G is the incident radiation. In contrast to the P-1 model…
length 13 5 Feed width 3 6 Thickness (h) 1.6 7 Wavelength (λ) 0.0546 m 8 Frequency (fo) 3.5GHz 9 Velocity of Light (c) 3x10^8 m Table 2: Antenna Feeding Techniques Description Patch Feed Coaxial Feed Aperture Coupled Feed Proximity Coupled Feed Feed Radiation More More Less Minimum Reliability Better Poor Good Good Fabrication Easy Soldering and drilling needed Alignment Required Alignment required Impedance Matching Easy Easy Easy Easy Bandwidth 2-5% 2-5% 2-5% 2-5% Figure 1: Array of square…
regarding the various bond types, the presence of different functional groups and interaction among them. FTIR spectroscopy provides opportunities to identify the unknown materials. In infrared spectroscopy the infrared radiations are passed through a sample. A portion of the radiation is absorbed by the sample and the remaining is passed through it. The resultant spectrum represents the molecular absorption and transmissions, creating a molecular finger print of the sample (Shurvell 2002). …
The term photoluminescence by definition can be refered to as a molecule or atom which absorbs electromagnetic energy and in turn, emits light.In quantum mechanics, it is where excitation to a higher energy state occurs, which then returns to a lower energy state, together with the emission of a photon. According to Seitz (2006) found in the Credo referencing database, “Photoluminescence excitation spectra are determined by measuring emission intensity at a fixed wavelength while varying the…
Acoustics is the branch of physics concerned with the study of sound. Sound is a wave made of vibrations in the air. Waves can be measured in a range of different ways: by their amplitude, wavelength, frequency, speed, and, at times, their phase. Sound information is transmitted by the amplitude and frequency of the vibrations, where the amplitude is experienced as loudness and frequency as pitch. The vibration is started by some mechanical movement and this causes a vibration on the molecules…