light entry into the inner eye and brings objects into focus. Light then then passes through the lens which focuses the light on the retina (made of rods and cones). The retina turns light into nerve impulses and sends it to the brain through the optic nerve. 2. Explain static and dynamic equilibrium. 6 points static equilibrium - The special sense which interprets the position of the head when not moving‚ allowing the CNS to maintain stability and posture. These levels are detected by mechanoreceptors
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Physical Networking Unit 7 Assignments Exercise 1 – Fiber Optics Definitions 1. Crosstalk – The coupling or transfer of unwanted signals from one pair within a cable to another pair. 2. Waveguides – A structure that guides electromagnetic waves along their length. The core fiber in an optical-fiber cable is an optical waveguide. 3. FTTH – Fiber-to-the-home 4. Simplex – a. A link that can only carry a signal in one direction. b. A fiber-optic cable or cord carrying a single fiber. Simplex cordage
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The main factor that leads to the damage of optic nerve is elevated pressure in the eye. The optic nerve is the main visual nerve of the eye. It transmits the images we see back to the brain for interpretation. The shape and tone of the eye is maintained by a pressure within the eye‚ which ranges between 8 mm and 22 mm of mercury. When this pressure is too low‚ the eye becomes softer‚ while an elevated pressure causes the eye to become harder. The optic nerve is the most susceptible part of the eye
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The first design was developed in 1821‚ where Augustin Fresnel applied the scientific knowledge of optics to develop the Fresnel lens that was tailored for lighthouse illumination. He designed it to have a bull’s-eye lens panel with different segments of rings. A single-square lens panel fabricated with 97 pieces of glass was laced up into the bulls-eye
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Telescopes Hans Lippershey (1570 - September 1619) was a Dutch lens maker. Lippershey is believed to be the first to apply for a patent for his design‚ a few weeks before Jacob Metius (a Dutch instrument maker and optician)‚ and making it available for general use in 1608. The telescope invented by Lippershey was composed of a convex and a concave lens‚ as this construction did not invert the image and had only a magnification of just 3x. Galileo’s telescope improved the original Dutch telescopes
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Snapdragon S4 processor with 2GB RAM‚ 32GB internal memory offers you a 4.5-inch PureMotion HD+ Amoled display like HTC One and Galaxy S4 sporting a PureView 41 MP sensor with Optical Image Stabilization (OIS)‚ Backside-illuminated image sensor‚ 6 lens optics‚ High resolution zoom 3x‚ Autofocus‚ Xenon Flash and HD 1.2 Megapixel wide angle camera weighting 158 grams and 2000 mAh battery with Wireless Charging.(press.nokia.com) COLORS:- 1. Yellow 2. Black 3. White KEY FEATURES:- • Main camera sensor:
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References: 1. Giancoli‚D.C. Physics for scientists and engineers with modern physics‚ Pearson education Ltd. London(2009). 2. Physics 112 lab manual.2012.Experiment 7. University of Botswana. Pp47-48
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10/6/2012 Optical Refractor/Phoropter Introduction An optical refractor or a phoropter is an optical instrument with many adjustable lenses and settings that quickly determine the patient’s exact refractive error and prescribe the exact vision correction needed when people have trouble seeing (blurred vision). Eye doctors or optometrists rely on some questions and a phoropter to determine the condition their patient has. Firstly the optometrist asks the patient what objects
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Alhazen Ibn al-Haytham‚ born 965ce – 1039ce an Arab /Persian scientist and polymath‚ also significant contributions to the principals of optics‚ as well as to physics‚ anatomy‚ astronomy‚ engineering‚ mathematics‚ medicine‚ ophthalmology‚ philosophy‚ psychology‚ visual perception‚ and to science in general with his early application of the scientific method. After being ordered by Al-Hakim bi-Amr Allah‚ the sixth ruler of the Fatimid Caliphate‚ to carry out this operation‚ he quickly perceived the
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of telescopes‚ we have made it possible to see the “impossible”. We are able to see the geographic landscape of distant planets and moons. Telescopes have made it possible to measure the speed of light‚ understand gravity‚ and grasp other laws of physics. Will the innovation of telescopes‚ we can detect stars by studying the heat and what kind of radioactive rays they emit. It is exciting to think of how our knowledge of the heavens will be greatened in the future with the development of telescopes
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