DEFINITION, FUNCTION, AND TELESCOPE PARTS
Well my friends, this time we will discuss the telescope, namely the notion Telescope, Telescope History, Parts Telescope, Telescopes Types, Functions Telescope, Telescopes Working mode. Immediately, we entered into an explanation.
DEFINITION TELESCOPE
The telescope is a visual aids (optical) to observe distant objects, especially objects that are in the sky as the moon and stars. The telescope can perform these functions because of its ability to amplify light and enlarge the shadow, so that objects can be seen that much closer and clearer. Also called binocular telescope.
TELESCOPE HISTORY
Hans Lippershey which is a maker of sunglasses comes from Middleburg, Netherlands. on October 2nd, 1608 created the first instrument called a telescope. This telescope has the ability to magnify objects that were observed up to five times. A year later in 1609, Galileo Galilei created the first telescope used in astronomy, which can magnify up to 20 times, so in 1610 he confirmed the theory of "sun-centered universe.
In 1668, Isaac Newton created a new telescope is a telescope that uses mirrors as a lens. So this discovery is a turning point in the history of science. Then in the mid 17th century, Havelius, an astronomer who came from Germany to make a telescope lens having a skeleton made of wood as high as 46 meters.
Furthermore Huygens which is an astronomer from Dutch using a telescope with different lenses, telescopes also do not use a tube and only consists of two lenses.
In 1897, in the Gulf Williams, United States, was made sebuat Yerkes telescope with a diameter of 101 cm, making it the largest lens telescope in the world at that time. Until now, the largest telescope Keck telescope which is made at the summit of Mauna Kea volcano in Hawaii, this telescope has the ability to view an area eight times larger than any other telescope.
PARTS TELESCOPE
The things you need to know to understand the parts of the lens are as follows:
a. Convex lens is a lens that collects light or convergent nature
b. Concave lens is a lens that is spread light or diverging
c. Convex mirror is a mirror that scatter light
d. Concave mirror is a mirror that collects light
d. Focusing distance is the distance required by lenses or mirrors to direct light at the focal point
f. The field of view is the area of the sky or the area that can be seen and observed through a telescope
g. The magnification of the focal length of the telescope divided by the focal length of the lens in the eye
h. Resolution is the closest distance between two objects can still be seen as two separate objects.
At the telescope, part of the most vital and most important is the lens. The telescope has two positive or convex lens, which is located close to the object is called the objective lens, and located close to the eye (where the observer peek) is called the eyepiece. On Earth telescopes also are inverting lens, which serves to reverse the shadows without magnification so that the final image is formed can erect as the direction of the original object.
Once upon a time, only a telescope lens and frame it, and put in function, but as the development of the times, the telescope is also equipped with the following sections:
a. The telescope tube, is where the main mirror is located, this tube has a diameter of 8 inches, the tube has a tube cover. On the back of the tube are visually flip back to a mirror mounting. The focal length can be set by turning the knob located under visual back
b. Finderscope, a small telescope mounted on the main tube
c. Eyepiece, is a function of the ocular lens. This eyepiece has a lock for security so it does not fall and disappear.
d. Mounting, better known as the cradle telescope, the main drive system on the telescope, which is equipped with regulating knob latitude, polar axis cap, scale the heights of latitude to determine the position of the observer latitude were, ballast to counterbalance the hour angle clock angle direction. At mounting there is also a connection port that consists of buttons including a button to turn the telescope
e. Tripod, as an accomplice to place telescope on a surface
f. Half Pillar, to raise the mounting position, so as to set the tripod hit the pole ballast when the telescope is in use
TYPES TELESKOP
Generally, the telescope is divided into three types, namely:
a. reflector telescope
Reflector telescope is a telescope that uses mirrors as a substitute for the lens to capture light and reflect it.
b. refractor telescope
Refractive telescope is composed of multiple glass lens as a tool used to capture light and perform the function of the telescope.
c. telescope catadioptrik
A telescope that has a working system that is not much different from the above two types of telescopes. Because this telescope is the combination of reflector and refractor telescopes, which use two media for gathering light, the mirrors and lenses.
examples of the refractor telescope is:
a. Earth telescope
This telescope is also called the telescope field telescope leagues, which produces the final image mid against the direction of the object initially. It is obtained from the use of third convex lens placed between the objective lens and the ocular lens near the eye. So the third convex lens only has a function to reverse the shadows without give magnification, so that the lens is also called the inverting lens.
b. telescopes Star
This telescope is also called the astronomical telescope is used to observe celestial bodies outside. Star telescope uses two positive lenses, respectively as the objective lens and eyepiece. Unlike the microscope, the telescope objective lens focus distance is greater than the focal distance of the ocular lens.
c. Galilei telescope
A telescope made by Galilei and is also called a telescope or a telescope belnada tonil. This telescope generates the final image that is erect and enlarged by using two lenses, a positive lens as an objective lens that is located close to the object and a negative lens as the ocular lens which is located near the eye of the observer.
d. Prism telescope
The use of inverting telescope lens to produce the final image which resulted erect earth became visible long telescope. To avoid this, the inverting lens is replaced with the use of two prisms angled isosceles inserted between the objective lens and eyepiece. The prism serves to reverse the shadows with reflection perfectly. Telescope used to see objects that are very far away so it looks closer and clearer.
Examples reflector
telescope is a telescope that uses a concave mirror and convergent (light gathering) who first invented by Isaac Newton in 1668, so that the telescope is also called Newtonian telescope. This was the beginning of a development that is seen from the telescope, because initially only using the telescope lens.
Then when entering the 20th century giant reflector telescopes were made such as those used in Hale in Observatium Mount Palomar, California, USA measuring 200 inches in diameter, this telescope was completed in 1948 and became the world's largest reflector telescope until a few twenty years later.
While the telescope catadoptrik example is a microscope, which has the objective lens and eyepiece, also has a reflective mirror that lies underneath, so objects appear more clearly observed. Another example is found in the lighthouse, a telephoto lens (the lens on a camera that can do much magnification) which is used by hunters and videos on wild animals distant. Also found in SLR cameras.
TELESCOPE FUNCTIONS
The main function of the telescope is to gather light and focus it more in terms of its diameter, so that more light can be collected. As a result, the telescope can see objects far away, do not even appear to be invisible as far as the eye can see.
The telescope also has an important role in the field of astronomy, without telescopes, astronomers can not do its job in detail. So once patented astronomical telescope by Galileo, so many planets and other systems located in the solar system that can be observed, such as Galileo Galilei directly observe the planets Venus and Jupiter with a telescope.
Other functions of newly discovered telescope hubble telescope was placed in space to send a picture by using electromagnetic waves. The wave will be captured by the earth with a clear outcome. Thus, this telescope helped people to observe objects in space.
HOW TO WORK A TELESCOPE
The workings of the telescope principle, only collects light, whether it is using a lens that is on the refractor telescope and use a mirror on a reflector telescope. Reflector telescope uses a concave mirror, which will reflect light and shadow image that is directed by a pair of binoculars, a concave mirror will add to the range so that they can see distant objects. Reflector telescope has the disadvantage that sometimes can cause shadows that seemed to be unfocused.
The main lens will collect shadows and light comes, then delivered to the retina of the eye through the media refraction. Media eye refraction there are five, namely the entry of light and shadow which will arrive first to the cornea (the outermost layer of the eye), then to the aqueous humor, pupil, vitreous body, and finally to the retina. After until shadow on the retina are transmitted through the optic nerve to the brain. Then one can interpret the image.
This is the explanation of the telescope, which is about Definition Telescope, Telescope History, Parts Telescope, Telescopes Types, Functions Telescope, Telescopes Working mode, may be useful for my friend all.
