Analysis Of Refractor Telescope

1872 Words4 Pages
bulb-icon

Recommended: Investigating refraction

The refractor telescope uses two glass lenses, the objective lens and the eyepiece len, to collect and refract parallel rays of light from distant objects in a specific way to produce a image that fits the size of our eyes pupil. The light rays are gathered through the opening of the telescope called the aperture, they then travel through the objective lens and refract onto a single point called the focal point. From here the light rays continue to travel in the same direction until they reach the eyepiece lens, which refracts the light back into parallel rays. Distant objects appear brighter, clearer and much more magnified than they really are because of this process. The magnification of a telescope can be calculated by using this formula …show more content…

The objective lens is the largest lens, with the largest focal length out of the two, it collects light and produces a real image of a distant object. The eyepiece lens is the smaller lens, with the smallest focal length, it takes the bright light from the focus of the objective lens and magnifies the image so that it takes up a lot of space on your retina. The final image that is created by the two lenses is inverted. This is because the objective lens inverts, but the eyepiece does not. for telescopes the image needs to be the right way up, so 45 degree prisms are placed between the objective lens and the eyepiece lens, this has the effect of turning the image the correct way up. Here is a diagram of how light travels through both the eyepiece lens and the objective …show more content…

Farsightedness is the inability to focus on images that are close up. The two main reasons people's eyes become farsighted later in life is because of the weakening of ciliary muscles or the decrease of flexibility of the lens in the eye. These 2 causes result to the lens in the eye unable of assuming the high curvature needed to see close up objects. The lens has a small capability of refracting light, and the images that are from close up objects are located behind the retina. The retinal surface where the light detecting cells are, detect that the close up objects are blurry. To help people with hyperopia a concave mirror is used to refract the light, scene as the lens within the eye cannot assume the high curved shape that is needed to see close up objects. The concave lens will refract the light rays before it enters the eye, therefore decreasing the images distance. Because the process where refraction of light occurs before the light reaches the eye the image of the close up object is focused on the retinal surface, creating a clear

Show More
Related

  • Hale Teescope Research Paper

    2180 Words  | 5 Pages

    Who has not ever, even if just for a brief moment, looked up at a dark but vividly lit starry night sky and wondered how far those seemingly little lights reach, and if that beauty goes on forever, or if it ends at some point. I believe this question has been pondered by mankind since our creation, and early astronomers are proof of this pondering. Telescopes began as a way for these early astronomers to chart the stars and planets and their movements as they searched for more than what just the naked eye could offer them. In the early 17th century, craftsman began making telescopes, though the tools to invent them had been available for centuries before. Early telescope were called spyglasses and needed improvement. Galileo's Optic Tube, also known as the Galilean telescope is an example of the early creation of refracting telescopes. There were a few different makers and models of refractor telescopes but it was soon discovered they could make a better telescope. With the beginning of the 18th century came the reflecting telescope, which is also called a reflector; an optical telescope that uses either a single curved mirror, or a combination of curved mirrors. There are many types reflecting telescopes: there is the Gregorian telescope, the Cassegrain telescope, and the Ritchey–Chrétien telescope. But today, we are going to be talking about one telescope in particular; "the 200 inch Hale Telescope, which for decades stood as the largest telescope on the planet"(1), from 1948 to 1976. The Hale telescope opened up the skies in ways we never imagined.

    Read More

  • Understanding and Treating Myopia

    1195 Words  | 3 Pages

    Myopia is a condition in which visual images come into focus in front of the retina of the eye. This condition causes objects at a distance to appear blurry, while objects nearby are seen clearly. If not severe, myopia can be treated with contacts or glasses. Other treatments for myopia include photoreactive keratectomy (PRK), LASIK, and orthokeratology. Degenerative myopia is a quick progression of myopia and leads to complete loss of vision. The treatment for degenerative myopia is a combination of medication and laser surgery.

    Read More

  • Myopia Argumentative Essay

    918 Words  | 2 Pages

    Myopia is more commonly referred to as nearsightedness and leaves the person with the ability to see objects that are close up clearly, but those that are far away are out of focus. Hyperopia, in contrast, involves the inability to see objects that are near clearly and is often referred to as farsightedness. Objects that are far away, however, can easily be seen. As humans age, they frequently develop a condition known as presbyopia. This condition decreases the person's ability to focus sharply on those objects which are nearby and is the result of the lens of the eye hardening.

    Read More

  • The Historic Hubble

    1058 Words  | 3 Pages

    As the Hubble telescope’s life comes to a historic end, we look back at all it has done for the scientific community. The Hubble has helped scientists make many new discoveries about our universe. Galileo Galilei and Edwin Hubble were huge contributes to the astronomical community, therefore a major help in transforming the first telescope into something as amazing as the Hubble. The first telescope was perfected by Galileo in 1609, and around four hundred years later the Hubble was launched into space. Since then the Hubble has shown scientists many new discoveries about space that they would have never been able to figure out without the Hubble’s help. Since April 1990 the Hubble telescope has been greatly appreciated by the scientific community because of everything it has done. However, the Hubble has faced many problems along its way as well.

    Read More

  • Recycling Glasses

    753 Words  | 2 Pages

    Eyeglasses have two main lenses. This includes a convex lens for nearsightedness, and a concave lens which is for farsightedness. With both lenses the light hits the glasses and bends inward or outward (depending on your circumstances; nearsightedness or farsightedness) According to LL. Woodward, many people say that contact lenses fulfill both nearsightedness and farsightedness. “Thanks to the advent of multifocal contact lenses, people with both vision conditions-presbyopia and myopia-now have the option, and the freedom, to choose to wear contact lenses only to improve their vision” - LL. Woodward. From my recent questioning to students with contacts, there are two different types of contacts; one is to sleep with and you can see the rest of the day without them and ones that you wear throughout the day.

    Read More

  • Valerie Thomas: NASA and her Invention: An Illusion Transmitter

    684 Words  | 2 Pages

    ...ossessed with three dimensional attributes. The optical effect may be explained by the fact that the human eyes see an object from two viewpoints separated laterally by about six centimeters. The two views show slightly different spatial relationships between near and near distant objects and the visual process fuses these stereoscopic views to a single three dimensional impression. The same parallax view of an object may be experienced upon reflection of an object seen from a concave mirror." (http://www.freepatentsonline.com/4229761.html).

    Read More

  • Mathematics of Human Vision and Corrective Lenses

    1683 Words  | 4 Pages

    The four main components of the eye that are responsible for producing an image are the cornea, lens, ciliary muscles and retina. Incoming light rays first encounter the cornea. The bulging shape of the cornea causes it to refract light similar to a convex lens. Because of the great difference in optical density between the air and the corneal material and because of the shape of the cornea, most of the refraction to incoming light rays takes place here. Light rays then pass through the pupil, and then onto the lens. A small amount of additional refraction takes place here as the light rays are "fine tuned" so that they focus on the retina.

    Read More

  • Persuasive Essay About Lasik Surgery

    501 Words  | 2 Pages

    Under-corrections are quite common in people who suffer from near-sightedness. It usually occurs if the corneal tissue is removed less than what is required. You may need an enhancement procedure to remove the tissue but it can be done only after a year.

    Read More

  • Mathematics of Telescopes

    1229 Words  | 3 Pages

    The principle behind the refractive telescopes is the use of two glass lenses (objective lens and eyepiece lens) to gather and bend parallel light rays in a certain way so that the image fits the size of the eye's pupil. Light rays is gather through the opening of the telescope called the aperture and passes through the objective lens and refracts onto a single point called the focal point. From there the light rays continue the same direction until it hits the eyepiece lens which also refract the light back into parallel rays. During the process, the image that enters our eyes is actually reverse of the original image and magnified because the size in which we preceive the image.

    Read More

  • The Hubble Telescope

    972 Words  | 2 Pages

    The Hubble Telescope is the world’s first space-based optical telescope. The Hubble telescope received its name from American astronomer Dr. Edwin P. Hubble. Dr. Hubble confirmed an ever expanding universe which provided the basic foundation of the Big Bang theory. The first concept of the Hubble telescope came from Lyman Spitzer in 1946, who at that time was a professor and researcher at Yale University. In 1946, Professor Spitzer believed that Earth’s atmosphere blurs and distorts light, and a space orbited telescope would be able to overcome this problem.

    Read More

  • Cataracts

    1763 Words  | 4 Pages

    After such surgery, some patients must wear strong glasses or contact lenses to see well

    Read More

  • The Contact Lens

    1233 Words  | 3 Pages

    When the contact lens was invented, the world of vision correction was altered forever. No longer were those people lacking perfect 20/20 vision forced to look any different than everyone else. Both discrete and revolutionary, the contact lens provided a brand new, viable, alternate solution to an age-old problem. After centuries of engineering and discovery the contact lens has evolved greatly. Presently contact lenses are made hard or soft, for daily or continuous wear, gas permeable, and even providing ultraviolet protection. A properly fitted pair of today’s discrete, convenient, versatile, and inexpensive contact lenses provide the best form of vision correction available in today’s market.

    Read More

  • Eyesight

    1145 Words  | 3 Pages

    Nearsightedness also known as myopia, is a disorder where one can see clearly close up, but see blurry at a distance (for example, not being able to read the blackboard but being able to read a book). This occurs when the eyeball is too long or the cornea is too curved to focus on the retina.

    Read More

  • The Human Eye

    2031 Words  | 5 Pages

    ...he cornea is deformed so that its surface is oval instead of spherical. Light rays are distorted at the entrance of the eye. This produces a blurred image and is known as astigmatism. To correct it, glasses are given a nonspherical or cylindrical curvature. Cross-eyes and walleyes are produced when both eyes do not work together because of weakness of the eye muscles.

    Read More

  • Physics Of Telescopes: An Introduction To Refracting Telescopes

    1806 Words  | 4 Pages

    The refracting telescope is one of many different types of telescope. Refracting telescopes work by refracting the light through an initial convex lens, (known as the objective lens), then through another convex lens (known as the eyepiece lens). These two lenses focus the light into the eyepiece so we can see the image clearly.

    Read More

More about Analysis Of Refractor Telescope

Open Document