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Long-wave electromagnetic radiation used in special telescopes includes infrared radiation and submillimeter radiation. These telescopes are designed to detect and study objects that emit or reflect these longer wavelengths of light, allowing astronomers to observe phenomena such as cool stars, cosmic dust, and molecular clouds.
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What purpose does ozone layer serve?
The purpose of ozone layer is to protect us from the harmful UV radiations from the sun. These are very harmful radiations and cause problems like skin cancer, eye cataract, modification in DNA etc.
Why do telescopes used for astronomy not have prisms to make the image the right way up?
Telescopes used for astronomy typically do not need to make the image right-side up because it doesn't affect the data or observations collected. In fact, having an inverted image is actually common in many optical systems due to the way the lenses bend and focus light. Telescopes prioritize light-gathering ability and image quality for observing celestial objects, rather than the orientation of the image.
Do x ray and gamma ray telescopes have the same design as an optical instrument?
X-ray and gamma-ray telescopes have different designs than optical instruments due to the nature of the radiation they are detecting. X-ray and gamma-ray telescopes use special mirrors or detectors to focus and capture high-energy rays, which can penetrate materials that conventional optical telescopes cannot. Optical instruments rely on lenses and mirrors that are optimized for visible light.
What special name is given to spinning stars that transmit radio waves?
Pulsars are spinning stars that emit radio waves in narrow beams. These beams are like lighthouses in space, rotating at precise intervals and creating a pulsing effect as they are detected by radio telescopes on Earth.
What are the instrument used to study astronomical bodies?
The Electromagnetic Spectrum: Window on the UniverseAstronomers rely on electromagnetic radiation detected by different types of telescopes to determine the location, composition, temperature, motions and magnetism of celestial objects. Electromagnetic radiation travels in the form of waves at the speed of light (299 792 km/sec) through space. Electromagnetic waves range from very low frequency radio waves through infrared radiation and visible light to ultraviolet radiation, x-rays and finally, high frequency gamma rays.Together, these waves form the electromagnetic spectrum. Electromagnetic waves are characterized by their frequency and wavelength which are inversely related:the greater the wave's frequency, the shorter the wavelength.Telescopes: Essential Tools for AstronomersTelescopes provide the means to collect and analyze electromagnetic radiation from distant realms of the universe. Different types of telescopes are used for distinct regions of the spectrum such as visible light, near infrared, microwaves, and radio waves.Planets, stars, gaseous nebulae, and distant galaxies appear differently when "viewed" in each region of the spectrum. This is because various types of radiation are sensitive to differences in the temperature and chemistry of the objects. Even the fact that an object can be readily detected by a particular wavelength gives the astronomer important clues, such as whether it is hot or cold.There are different categories of telescopes: optical telescopes collect visible light, but other telescopes, for example radio telescopes, can collect radiation invisible to the human eye. Since Galileo pioneered the use of the optical telescope in the 17th century, increasingly more powerful instruments have been developed, including the Hubble Space Telescope and the new Gemini Telescopes. In 1932, Jansky invented radio telescopes, which have developed into facilities like the James Clerk Maxwell Telescope.ptical Telescopes: Reflecting and RefractingA device such as a lens, mirror or antenna collects electromagnetic radiation from celestial objects and focuses it onto a detector. Optical telescopes use special versions of the charge-coupled devices found in video cameras, while radio telescopes use specialized receivers like those in radios or TV sets.The term refraction refers to the bending of light. Refracting telescopes employ a series of lenses to collect visible light. Most telescopes in use today are reflecting because bigger telescopes can be built with mirrors than with lenses. Reflecting telescopes have a concave primary mirror, normally parabolic in shape and located at the lower end of the telescope. It reflects the light of celestial objects to a focus. The light is often intercepted by a smaller mirror that reflects it down through a hole in the primary mirror to an instrument, such as a camera or a spectrograph, for analysis.Together, radio and optical telescopes help astronomers to build a more complete picture of a region of space.Radio Telescopes: Collectors of Invisible RadiationAll objects in space emit radio waves, so a radio telescope can be used to detect them. A large curved metal dish, or antenna that resembles a parabolic satellite TV dish, collects the radio waves and reflects them to a focus point above the centre of the dish. Here, a sensitive receiver converts them into an electrical signal, which is interpreted by a computer. Radio telescopes "see" through clouds of dust that optical telescopes cannot penetrate.There are two types of radio telescopes- single antenna or multiple antenna (interferometer). Images are created by scanning a single-antenna telescope across the sky, or by letting the rotation of the Earth move a group of telescopes pointed at the source of the radio wave emission. This scanning creates a sequence of signals, coming from different parts of the source. A computer processes these signals to create a representative image of a celestial body.National Research Council FacilitiesThe National Research Council (NRC) provides telescopes for Canadian astronomers and their students to use for their research. The largest facilities are international ones, located on the best sites in the northern (4200-m high Mauna Kea, Hawaii) and southern (2700-m high Cerro Pachón, Chile) hemispheres, where more than 300 nights a year offer clear viewing. NRC also operates radio and optical telescopes in British Columbia. Visitors are welcome at the B.C. facilities. NRC's Herzberg Institute of Astrophysics designs and builds the sensitive instrumentation and writes software that enable the telescopes to detect signals from the furthest realms of the universe. Astronomers must compete for access to telescopes and may spend only a few nights (or shifts) a year observing on any one telescope. Most of their time is spent analyzing the data they obtain on those nights.Gemini 8-m TelescopesGemini is an international partnership of the US, UK, Canada, Chile, Australia, Argentina and Brazil. An optical telescope in each hemisphere allows astronomers to study the entire sky. Gemini North is located on Mauna Kea in Hawaii and Gemini South on Cerro Pachón in the Chilean Andes. The telescopes are designed to give exquisitely sharp images. Canada is providing sensitive equipment that will help Gemini users make many exciting scientific discoveries.Canada-France-Hawaii 3.6-m Telescope (CFHT)An optical telescope, CFHT began operating in 1979 as a partnership between Canada, France and the University of Hawaii. CFHT pioneered techniques, including "adaptive optics", to remove the twinkle from stars caused by the continual motions of the Earth's atmosphere, thus making CFHT renowned for very sharp images.For Canadian astronomers, CFHT has played critical roles in their studies of massive black holes in the centres of galaxies, the evolution of stars, and in demonstrating that the universe will expand forever.Dominion Astrophysical Observatory (DAO) TelescopesNRC operates two optical telescopes located on 230-m high Little Saanich Mountain, 17 km north of Victoria, B.C.With continual upgrading, the 1.8-m Plaskett Telescope (1918) remains highly productive. It was used during its first two decades of its life to measure accurately the size and mass of the Milky Way galaxy. Today, among many programmes, it is used to determine orbits of asteroids that might strike the Earth.The 1.2-m McKellar Telescope (1962) is used for precision analyses of the properties of stars and pioneered development of techniques to find planets around nearby stars.The James Clerk Maxwell Telescope (JCMT)This 15-m telescope on Mauna Kea is a partnership between the UK, Canada and the Netherlands.Since its opening in 1987, the JCMT radio telescope has probed the interstellar medium, star forming regions, and the earliest phases of galaxy evolution, by studying their microwave radiation.JCMT astronomers detected complex molecules in Comet Hale-Bopp (1997) that had never before been seen in a comet.Dominion Radio Astrophysical Observatory (DRAO) TelescopesLocated near Penticton, B.C., the DRAO operates a seven-antenna radio telescope that is mapping large parts of the plane of the Milky Way galaxy to study how the interstellar gas changes from stellar birth to stellar death.A 26-m diameter radio telescope is used alone (for example, to study pulsars), or is often used in conjunction with the seven-antenna telescope to provide more complete maps of the Milky Way.A small radio telescope maintains daily records (dating back to 1946) of radio radiation from the Sun. These data are used worldwide for studying solar-terrestrial relationships such as long term climate change or predicting disturbances of power and communications caused by storms on the Sun.
Why do welders wear special goggles or facemasks with glass windows?
so that they can protect their eyes from harmful electromagnetic radiations.
What is the telescopes special uses?
To look at things in the sky\
Does and ordinary window glass have a very high transmissivity in the longwave infrared band?
No, ordinary window glass has a low transmissivity in the longwave infrared band. It absorbs and reflects the infrared radiation rather than allowing it to pass through. To improve transmissivity in this range, special coatings or materials can be used.
How do we see stars?
Either with our eyes, or with special instruments such as binoculars or telescopes.
What do ultraviolet telescopes see?
Ultraviolet telescopes are similar to optical reflecting telescopes, but their mirrors have special coatings that reflect ultraviolet light very well. Ultraviolet telescopes provide much information about interstellar gas, young stars, and the gaseous areas of active galaxies.
What design variants might one see in an optical telescope?
Some design variants you may see in an optical telescope include telescopes that fold or divert the optical path with mirrors and telescopes that use special lenses to enhance the images.
What radio astronomy?
That refers to researching the Universe by observing radio waves. Special telescopes - radiotelescopes - are built for this purpose; they are often quite large.
What Layers of the Sun can be seen with some type of telescope?
The photosphere, chromosphere, and corona of the Sun are typically visible with specific types of telescopes. The photosphere is the lowest layer and what we usually see with the naked eye, while the chromosphere and corona can be observed during a solar eclipse or with specialized solar telescopes that filter out the intense brightness of the photosphere.
Why is a x-ray machine a form of electromagnetic energy?
It is a form of electromagnetic energy because it uses special light rays to see through your skin/body to see your bones. It's heat and light is what makes it an excellent example of electromagnetic energy.
Where are all the special functions of the GoldenEye?
It can send out an electromagnetic pulse, causing a global computer meltdown.
Why is the hubble telescope so special?
It is speacial because It can observe the heavans much better than ground telescopes. It is also the largest and most versatile space telescope
What is exactly that travel in a light waves?
Light. Note that light is a special case of electromagnetic waves; but if it isn't visible light, you wouldn't call it a "light wave", just an "electromagnetic wave".
