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Central Nervous System Part Of The Brain
5,865 wordsWhen we discuss our brain, we usually focus on the brains ability to think. That task alone is extremely complex and involved, but the brain also has many other tasks. Most of the time the brain is on autopilot, meaning that most of the activities preformed are just automatic. Our five senses; sight, sound, touch, taste, and smell, are automatically preformed in our brains. We don't have to think about how something sounds, we just hear it and we then interpret that sound. The largest area of ou...
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Focal Length Distant Objects
1,280 wordsLight and other kinds of electromagnetic radiation coming from the universe outside the Earth must travel enormous distances through space and time to reach observers. Only the brightest and nearest stars can be seen with the unaided eye. To see farther and to clarify and measure what is seen, a telescope is needed. The word telescope is derived from the Greek words tele, "from afar, " and shops, "viewer. " Even a simple homemade telescope can clearly show Saturn's rings, Jupiter's bands and red...
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Niels Bohr Model Of The Hydrogen Atom
365 wordsNiels Bohr's model of the hydrogen atom, was the primary reason for the understanding of energy levels. Bohr was able to explain the bright line spectrum of hydrogen. Sparked by the recent discovery of the diffraction patterns, scientists believed electrons could be described as waves. Bohr hypothesized that energy is being added to the hydrogen gas in the electricity form, and then leaving the gas in the form of light. He figured the light rays to be quantized, meaning only certain frequencies ...
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The Eye And Laser Surgery
1,567 wordsA Functioning Eye (Emmetropia) The eye is the organ of sight. It is used in almost everything we do, from playing sport to reading. A normal and well functioning eye can focus objects and images, both near and far, perceive depth and adapt to changes in light. The perception of depth is due to having two separate eyes creating two separate images, while the ability to adapt to light change is attributed to the iris and the dilator muscles. However these two aspects of the eye are not involved in...
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Distant Objects Whats Wrong
687 wordsThe human eye is a wonderful thing. It lets us view things. They can give us another eye color, or we could just use them to simply view things. But its not that simple you see. Some people arent that lucky, and have impaired vision. This includes near-sightedness and far-sightedness. To begin though we must understand how the eye works, and why it works that way. First is the cornea, which is a clear dome that covers the front of the eye. The cornea accomplishes the majority, which is about 70 ...
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Mayo Clinic American Academy
2,305 wordsCataracts In Cataracts Cataracts 2 Cataracts In Elderly Introduction What is a cataract? A cataract is a cloudy or opaque area in the normally transparent lens of the eye. Its effect on vision depends on the extent of the cloudiness. Small spots in the lens may cause little or no vision loss. As the opacity thickens, it prevents light rays from passing through the lens and focusing on the retina, the light sensitive tissue lining the back of the eye. Early lens changes or opacities may not distu...
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Optic Nerve Nerve Impulses
2,120 wordsThe Human Eye The Eye is the organ of that you gives your sight. Eyes enable people to perform tasks and to learn about the world that around them. Sight, or vision, is a rapidly occurring process that involves interaction between the eye the nervous system and the brain. When someone looks at an object, what he / she is really seeing is the light that the object reflects, or gives off. This reflected light passes through the lens and falls on to the retina of the eye. Here, the light induces ne...
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Speed Of Light Degrees Celsius
1,124 wordsThe Properties of Light Applied to Fibre Optics One of the basic properties of light is that it travels in straight lines and can have it? s direction changed. This is the property which is applied to achieve the purpose of Fibre Optics which is to carry light from one place to another. The way this is done can be explained by the principle of refraction. This is the principle which governs the behaviour of light as it passes from one transparent substance to another. It states; if a ray of ligh...
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Light Waves Light Rays
1,064 wordsToss a pebble in a pond -see the ripples? Now drop two pebbles close together. Look at what happens when the two sets of waves combine -you get a new wave! When a crest and a trough meet, they cancel out and the water goes flat. When two crests meet, they produce one, bigger crest. When two troughs collide, they make a single, deeper trough. Believe it or not, youve just found a key to understanding how a hologram works. But what do waves in a pond have to do with those amazing three- dimensiona...
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Optic Nerve Fibrous Tissue
2,262 wordsWhat are visual defects and how common are the by Nate Schackow 2 nd Period December 17, 1996 The human eye does alot more than allowing you to see. It is very complex and has many parts and features which can have defects. However, to understand defects you must first know how the eye works. First light passes through the cornea, which is the transparent part of the sclera, or white of the eye, which is composed of tough fibrous tissue. Behind the sclera is a watery fluid called the aqueous hum...
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Hydrogen Atoms Energy Levels
374 wordsNiels Bohr s model of the hydrogen atom Niels Bohr s model of the hydrogen atom, was the primary reason for the understanding of energy levels. Bohr was able to explain the bright line spectrum of hydrogen. Sparked by the recent discovery of the diffraction patterns, scientists believed electrons could be described as waves. Bohr hypothesized that energy is being added to the hydrogen gas in the electricity form, and then leaving the gas in the form of light. He figured the light rays to be quan...
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