they are invisible or silent to humans without man-made devices. One small change in a wave can make a world of difference in its entire energy outcome. Waves are very interesting items that effect our lives both positively and negatively. UV. Radiation in sunlight is divided up into three separate parts which are based on wavelengths‚ or more commonly read as energy. These parts are UV-A ‚ UV-B.‚ and UV-C.. UV-A. is 320-400 nanometers. In general shorter wavelengths are more harmful to living organisms
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P1 AQA – Revision Notes 1. Heat Transfer • Thermal radiation = infra-red radiation (beyond red part of visible spectrum) • Surface of sun is 5500 degrees. • Greenhouse effect is the idea that the earth is a greenhouse‚ and the atmosphere is glass that stops substances exiting or entering. • DARK‚ MATT SURFACES emit more radiation than shiny‚ light ones‚ and absorb radiation better. • Conduction: free electrons are given energy where heated and diffuse – this energy is passed on as electrons
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Assessment Worksheet Performing a Vulnerability Assessment CSS150-1502A-02 : Introduction to Computer Security Course Name and Number: _____________________________________________________ Johnathan McMullen Student Name: ________________________________________________________________ Stephen Osborne Instructor Name: ______________________________________________________________ Lab Due Date: ________________________________________________________________ Overview In this lab‚ you used Nmap commands
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Microwave Transmission Basics Microwave Transmission Basics Table of Contents • MW Advantages • MW Frequency bands • MW Link elements • Antenna Radiation Pattern • MW Alarms Microwave Transmission Basics Features Advantages Rapid Deployment – A microwave link can be installed in as little as one day No right-of-way issues – Radio spans all obstacles such as roads‚ railways‚ etc.‚ avoiding any requirement to seek permissions that inevitably are costly and introduce time delays
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Development Isaac Newton – Particle Theory & Prism Christiaan Huygens – Wave Theory Thomas Young – Double-Slit Experiment James Maxwell – Electromagnetic Theory Heinrich Hertz – Radiowaves & Wireless Experiment William Roentgen – X-rays Max Planck – Radiation Theory Albert Einstein – Photo Model • 3. Isaac Newton (1642-1727) Particle Model of Light (1671) Light rays is comprised of a stream of massless particles • 4. Particle Model of Light (1671) Explains straight-line propagation of light:
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nuclei stable and others unstable? Whether nuclei are stable or unstable depend on their neutron:proton ratio. What happens when an unstable nucleus emits an alpha or beta minus particle? Alpha radiation consists of alpha particles which each comprise of 2 protons and 2 neutrons. Beta radiation consists of fast moving electrons. A beta minus particle is emitted because a neutron is changing into a proton. What is a photon? A photon is a ‘packet’ of quantum of electromagnetic waves. An
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my book is that after the explosion‚ three of the main characters got very ill do to radiation sickness. Father Kleinsorge is walking through the city to deposit money in Hiroshima when he suddenly becomes weak and barely makes it back to the mission. Mrs. Nakamura’s hair begins to fall out‚ and she and her daughter become ill. At the same time‚ Mr. Tanimoto‚ weak and feverish‚ becomes bedridden do to the radiation sickness. So he doctors started to reopen their hospitals and so now the people are
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stress disorder can only occur after a traumatic event. The diagnostic criteria according to the DSM IV (1994) for PTSD are as follows;- “The essential feature of Posttraumatic Stress Disorder is the development of characteristic symptoms following exposure to an extreme traumatic stressor involving direct personal experience of an event that involves actual or threatened death or serious injury‚ or other threat to one ’s physical integrity; or witnessing an event that involves death‚ injury‚ or a threat
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speed is different. The refraction of light when it passes from a fast medium to a slow medium bends the light ray toward the normal to the boundary between the two media. The definition of produced visible light means when the electromagnets radiation meets the human eye. The first example of produced is a glow stick because it produces its own light . Another example of produced visible light is Fireworks. Also a vapor lamp is a good example of produced light . The definition of reflected means
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disk-shaped plastic enclosure about 150 millimeters and 25 millimeters thick. Figure 1 In the Ionization detectors have an ionization chamber and the ionizing radiation. The ionizing radiation is a minute quantity of americium 241‚ which is a source of alpha particles. The radiation passes through the ionization chamber and the air-filled space between the two electrodes. Smoke that enters the chamber will absorb the alpha particles and will reduce the ionization and
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