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high definition remote Sakura 30*60 20000m blue vision binoculars telescope | ![]() |
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US $14.99 | 22d 16h 9m |
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High quality HD High definition clear Sakura 30*60 remote binoculars telescope | ![]() |
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US $14.99 | 22d 1h 46m |
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8x32 High-Definition Zoom Binoculars Telescope 126m/1000m Hot + Case | ![]() |
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Portable outdoor camping Spotting Scope monocular High definition TELESCOPE | ![]() |
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outdoor camping Spotting Scope monocular 12x32 High definition coated TELESCOPE | ![]() |
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Telescope Definition

Particle Cascade/Cascade Particle?
Could anyone give me a definition? I need to be able to understand the process of cascade particles being read by gamma ray telescopes as they hit the Earth's atmosphere and reach us. Thanks!
Much of the success of ground-based gamma-ray astronomy comes from detection techniques based on a single physical phenomenon. When a very high energy gamma ray (energy > 100 GeV) enters the earth's atmosphere it interacts with an atomic nucleus. This interaction initiates a cascade of subatomic particles and electromagnetic radiation. Depending on the energy of the primary gamma ray, there are a number of ways by which such cascades may be detected. For the highest energy gamma rays, the cascade may penetrate far enough into the atmosphere for the sub-atomic constituents to be detected at ground level, using particle detectors. For less energetic primaries, the cascade dies out high in the atmosphere, however such showers are still detectable via the short-pulsed Cherenkov emission of their relativistic constituents. This approach was first proposed as far back as 1958 (Morrison, 1958) and was quickly followed by extremely optimistic flux predictions, however detection of gamma radiation using ground-based experiments would prove much more difficult than frst thought
http://ferdia.ucd.ie/index.php?option=com_content&task=view&id=22&Itemid=53
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![]() |
high definition remote Sakura 30*60 20000m blue vision binoculars telescope | ![]() |
![]() |
US $14.99 | 22d 16h 9m |
![]() |
High quality HD High definition clear Sakura 30*60 remote binoculars telescope | ![]() |
![]() |
US $14.99 | 22d 1h 46m |
![]() |
8x32 High-Definition Zoom Binoculars Telescope 126m/1000m Hot + Case | ![]() |
![]() |
US $39.98 | 11d 16h 58m |
![]() |
Portable outdoor camping Spotting Scope monocular High definition TELESCOPE | ![]() |
![]() |
US $24.99 | 8d 20h 21m |
![]() |
outdoor camping Spotting Scope monocular 12x32 High definition coated TELESCOPE | ![]() |
![]() |
US $25.99 | 2d 20h 1m |
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OttLite 964008 Telescoping Table Lamp in White
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IMAX: Hubble (Blu-ray + DVD + Digital Copy Combo Pack) [Blu-ray] |
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Clear photos of UFO taken by Antonio Urzi with a camera connected to a telescope, Italia
What are......and how are they used by scientist?
What are
spectroscope
satellites
radio telescope
space station
i need to know the definition and how are they used by scientists
plz dont give me such a big or complicated definition like those on the other dictionaries.
n plz dont think i am trying to make u guys do the homework trust me this is only a little part of it i already got the pics and the others
thank you soooooooooooooo much!
Spectroscopes are machines used to measure light on a specific part of the spectrum.
Satellites are natural or artificial objects orbiting a planet, star, or any other mass in the universe.
Radio telescopes are instruments used to listen to radio waves and analyze them. They are sometimes used to look for extraterrestrial communication.
Space stations are artificial satellites orbiting the Earth in which astronauts can perform tests in space. The most well-known is the ISS, the International Space Station.
There you go.










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