Telescopes - Principle of Operation and Factors that Affect Its Properties
Telescopes are devices that are used to view the distant objects. They find its use in astronomy and physics. It enables you to view the distant objects by magnifying them. There are many types of telescopes and their prices vary according to the specifications. Many accessories are also available that can be used in conjunction with the telescopes. Small telescopes that are used as toys are also capable of viewing some objects around 50 meters away.
Principle in which the telescope works
The principle in which the telescope works is very simple. There are two lenses that make up the task of viewing the objects that are at a distance. One of the lenses picks up the light from the object viewed and makes it available at a focus point. Another lens picks up the bright light from the focus point and spreads it out to your retina so that you can view. The lens that picks up the light from the object is called the objective lens or primary mirror. The lens that picks up the light from the focal point is called the eyepiece lens.
Factors that affect the viewing of the object
The capability of the telescope to collect the light from the object that is viewed and the capability to enlarge the image are the factors that affect the efficiency of the telescope. The capability to collect light from the object depends on the diameter of the lens or mirror, which is otherwise called the aperture. The larger the aperture the more the light it can collect. Enlarging of an image depends on the combination of the lenses that are used. The eyepiece in the telescope performs the magnification.
Some of the world's largest optical telescopes in operation
We say a telescope to be larger based on the aperture size. Based on this we can say that Keck and Keck II are the largest telescopes in operation with an aperture of 10 meters diameter. The Keck telescope is composed of 36 mirror segments. This is located at Mauna Kea, Hawaii. The next largest is Hobby-Eberly located at Mt. Fowlkes, Texas which has an aperture of 9.2 meters. You can get a list of the largest optical telescopes at http://astro.nineplanets.org/bigeyes.html.
Choosing your telescope
The choice of the telescope largely depends on what you want to observe. You can choose compound telescopes and refractor type of telescope for viewing through the urban skies. For the rural skies, you can use compound telescopes and reflectors. They are better than the refractors type of telescopes. Each type has its own advantages and disadvantages. Hence, many people have different telescope for different purposes.
For more information visit http://www.TelescopeInfoCenter.com
This RSS feed URL is deprecated, please update. New URLs can be found in the footers at https://news.google.com/news
How I Became Interested In Looking At The Moon
Like a lot of kids, my folks gave me a 60mm telescope for Christmas one year. The scope was a typical department-store brand - not very good - but to a 12-year old kid it opened up the universe.
Can Rain Makers Really Make Rain?
Whenever there's a drought, someone will come up with the idea of finding a rain maker, or holding a day of prayer for rain.Now far be it for me to make light of people who are in truly desperate straits and who are prepared to try anything to relieve their precarious situation.
Will Clones Run the World?
In the US it appears that we have decided that "life is not for sale" and that the cloning debate is over and our scientists are forbidden by law from attempting to clone humans. In other countries they are currently trying and will most likely continue to try until they get it right.
Re-Designing the ICBM With The Latest and Greatest Technology
We propose a Stealth Aircraft or non-stealth composite aircraft to have a honey comb structure with an external shell or skin for the diffraction of incoming laser weaponry, which we believe based on the results of the THEL Anti-Missile Defense System success, will be what future enemies will use to attempt to down our US Aircraft. Israel is selling information and weapons to China, Pakistan and other nations.
RFID Sensors to Protect Water Supplies
Recently the US Military has developed a special set of sensors for water supplies for troops. Any time a base camp is set up it is important to monitor the water supplies and test them.
Rodent Populations are Half within 3 miles of a Railroad Track
About a month ago, I was helping a friend collect meteorites. We picked out a grid pattern and started walking six to 9 feet apart with metal detectors looking for the iron-nickel meteorites which are quite common here on the Earth's surface The grid is large and takes many days to even make a dent in it and each time we are able to collect some meteorites.
Megaliths and Pole Flips
The changes in the earth magnetic field away from the 7.8 cycle rhythm that it has been for a long time is something that may be a result of the things man has done to the Earth.
DNA Testing Has Changed Everything
Since its discovery 20 years ago, the use of DNA for human identity and relationship testing has emerged as a powerful tool in both civil and criminal justice systems. DNA testing can reveal whether two or more individuals are related as well as determining the nature of their relationship.
Laser Ionization Airflow Tunnel Flight Theory
I believe their is a way to have an on board aircraft laser the air in front of it and move the air out of the way, thus less friction at lower altitudes, no sonic booms and rapid acceleration no induced or parasite drag at low altitudes. You could call it hyper laser atmospheric conditioning.
Electromagnetic Energy in Space
Tesla was always looking for a way to harvest electromagnetic energy and deliver it to the world wireless, after reading a biography about Tesla, I had come up with this concept.Why not put a satellite that counter rotates the Earth and is located at the poles.
Efficient Transportation Systems
We see in the organized world of the Japanese with their transit systems and floating airports and super engineering anti-Tsunami bridges many ideas in the theory of flow, which assists every part of their society and civilizations. They are masters of the flow of transportations and work hard to perfect every aspect and detail of their transportation system.
Paternity Testing Regulation: Help or Hindrance?
IntroductionThe internet has opened up opportunities for many DNA laboratories to distribute free paternity test kits in hopes of a sale from returned samples. In Europe, France is the only country that regulates how paternity tests are conducted.
Free Energy from Space
Tesla was always looking for a way to harvest electromagnetic energy and deliver it to the world wireless, after reading a biography about Tesla; I had come up with this concept. Harvesting and Wireless delivery of Electromagnetic Energy From Space.
Philosophical Discussion of Distribution Systems
To properly understand marketing one needs to understand the natural march of distribution from a colony of ants to Wal-Mart's Distribution System. Efficient systems must be designed or worked out by nature over thousands if not millions of years of evolution.
Life on Mars, Warm Water Under our Ice Caps, Evidence, Microbes under Our Feet
Well many people out there are asking is there really life on Mars? Our Thinking Group has been asking not if, what type?An article I remember reading and article in Astronomy Magazine back in 1996 that read was there life on Mars and it was an article about a meteorite that landed here on Earth and it was found in 1984 in Antarctica in the Allen Hills ice fields, like I even know where that is? It had bacteria fossils and remains of bacteria that lived about 3.6 billion years ago and the meteor appeared to have come from Mars.
Electromagnetic Energy in Meteorites - Theory
I have some friends who have the largest private meteor collection on Earth. He and his son 14 years old and a candidate for this idea; Now then in conversations, they explained all the cataloged meteor findings and found that each US state has 500 (there is an encyclopedia of such no doubt?) or so findings and confirmed by tests such as cross cut section, material grain patterns, density not found on Earth, etc, etc.
UAV Air-Breathing SAM Upgrade Recommendations
Can a hybrid Surface to Air Missile, UAV loiter for hours and then become a missile to down an enemy aircraft?Small UAV surface to air missile (SAM), which is air-breathing is a good idea and yields many possibilities to the future of air combat.http://www.
Older C-130 Hercules Aircraft Problematic
We have certainly seen around the world many Lockheed C-130 Aircraft, which have had problems over the last five years. Many of these aircraft have in excess of 100,000 total time airframe hours on them.
Science Fiction by Arthur C Clarke
It is difficult to have a discussion with someone about science fiction if they are not familiar with the works of Arthur C Clarke. The concepts are not too awfully difficult to understand and not nearly as complex as reading Issac Asimov for the science fiction novice and anyone can enjoy Mr.
Tactile Pressure Sensors for Future Robotics
Scientists and Robotic Researchers are attempting to design human type personal assistance robots. As they work to develop algorithms, which most resemble the thought processes of the human brain others are attempting to make them more life like thru human behavioral techniques of mirroring and facial features.
|home | site map | Xray Photography|