Explanation: Note that all of these are just different "intensities" of radiation and in a manner, different intensities of light. Related questions What are the biological effects of UV radiation?
What are the effects of nuclear radiation on living things in the environment? What are the stochastic effects of radiation? What are some harmful effects of solar radiation? What are the negative effects of alpha radiation on humans? Visible light waves are seen when a prism breaks up white light and divides it into the colors of the rainbow. Red has the longest wavelength; its particles travel the slowest. Violet has the shortest wavelength, which indicates that its particles travel the fastest and are the most energetic.
World View. It's a big drop, so the photon has a high energy level -- it is an X-ray photon. The free electron collides with the tungsten atom, knocking an electron out of a lower orbital.
A higher orbital electron fills the empty position, releasing its excess energy as a photon. Free electrons can also generate photons without hitting an atom.
An atom's nucleus may attract a speeding electron just enough to alter its course. Like a comet whipping around the sun , the electron slows down and changes direction as it speeds past the atom.
This "braking" action causes the electron to emit excess energy in the form of an X-ray photon. The free electron is attracted to the tungsten atom nucleus. As the electron speeds past, the nucleus alters its course. The electron loses energy, which it releases as an X-ray photon.
Contrast Media In a normal X-ray picture, most soft tissue doesn't show up clearly. To focus in on organs, or to examine the blood vessels that make up the circulatory system, doctors must introduce contrast media into the body.
Contrast media are liquids that absorb X-rays more effectively than the surrounding tissue. To bring organs in the digestive and endocrine systems into focus, a patient will swallow a contrast media mixture, typically a barium compound. If the doctors want to examine blood vessels or other elements in the circulatory system, they will inject contrast media into the patient's bloodstream. Contrast media are often used in conjunction with a fluoroscope.
In fluoroscopy, the X-rays pass through the body onto a fluorescent screen, creating a moving X-ray image. Doctors may use fluoroscopy to trace the passage of contrast media through the body. Doctors can also record the moving X-ray images on film or video. The high-impact collisions involved in X-ray production generate a lot of heat. A motor rotates the anode to keep it from melting the electron beam isn't always focused on the same area. A cool oil bath surrounding the envelope also absorbs heat.
The entire mechanism is surrounded by a thick lead shield. This keeps the X-rays from escaping in all directions. A small window in the shield lets some of the X-ray photons escape in a narrow beam.
The beam passes through a series of filters on its way to the patient. A camera on the other side of the patient records the pattern of X-ray light that passes all the way through the patient's body. The X-ray camera uses the same film technology as an ordinary camera , but X-ray light sets off the chemical reaction instead of visible light. See How Photographic Film Works to learn about this process. Generally, doctors keep the film image as a negative.
This wavelength range is very small compared to the range of other types of electromagnetic waves. The human eye is only capable of looking at a very narrow window of light when the whole spectrum is concerned. Visible spectrum is bordered by infrared radiation from the lower end and ultraviolet radiation from the high energy end. Coming from Engineering cum Human Resource Development background, has over 10 years experience in content developmet and management.
If an EMF frequency is transmitting randomly on a hrtz to hertz per second ,what does it constitute or imply? Your email address will not be published. Comments If an EMF frequency is transmitting randomly on a hrtz to hertz per second ,what does it constitute or imply? Leave a Reply Cancel reply Your email address will not be published.
0コメント