How are gamma rays produced? How is curium made? How is graphene aerogel made? How are fiber lasers made? How was baryonic matter made? How is a jet engine made? How do you refract with a phoropter? What happens to a light wave when it travels from air into glass?
The γ-rays are emitted isotropically, i.e. with equal probability in all directions, with solid angle 4π steradians. Seen from the source, the detector subtends a solid angle Ω, defined by the area of the detector, which determines the geometric factor. At a large distance, the ...
How do X-rays use electromagnetic waves? How is ionizing radiation used? What subatomic particle was discovered using the cathode ray tube? How does electron capture release gamma rays? How are positrons made? What year was the cathode ray tube experiment?
X-rays: X-rays are very high-energy light waves. We're most familiar with their use in a doctor's office, but X-rays also naturally occur in space. But don't worry, X-rays can't penetrate from outer space to the Earth's surface. Read more in How X-rays Work. Gamma rays: Gamm...
Spherical gamma-ray sources are typically detected using specialized instruments, such as gamma-ray telescopes or detectors on satellites. These instruments are able to detect the high-energy gamma rays emitted by the source and map out its properties. Are there any known spherical ga...
These neutrons can be absorbed by other atoms and cause nuclear reactions, such as decay or fission, or they can collide with other atoms, like billiard balls, and cause gamma rays to be emitted. Neutron radiation can be used to make nonradioactive atoms become radioactive; this has practica...
Gamma rays are the most high-energy types of electromagnetic radiation. In actuality, all high energy photons are radiations. These photons are created by nuclear decay as well as high-energy physical experiments. They are the most energetic photons that are found in the spectrum known as electr...
(Gamma rays are also emitted by powerful explosions in the distant universe, though these are separate phenomena.) These bursts of energy, known as terrestrial gamma-ray flashes, come from lightning. The powerful electric fields of lightning bolts hurl avalanches of electrons near the speed of ...
Alpha, beta and gamma rays are everywhere around us. Part of these rays are coming out of the earth (e.g. alpha rays are emitted by the gas Radon which leaks from cracks in the shell of the earth) and another part is coming from outer space. Compare it to the light coming from the...
These radioactive atoms are formed by bombarding normal chemicals with neutrons to create short-lived radioactive isotopes. PET detects the gamma rays given off at the site where a positron emitted from the radioactive substance collides with an electron in the tissue (Figure 1). In a PET ...