Human Eye Vs. Animal EyeBy:Andrea Torres ABSTRACT The tapetum lucidum is an evolutionary advantage for animals. It enables animals to see in dimmer light than the animal would otherwise be able to see in. The tapetum lucidum is useful to animals‚ but it also has a use to humans. Human beings use the tapetum lucidum to scan for reflected eye-shine‚ in order to detect and identify the species of animals in the dark and to send trained search dogs and search horses out at night. Historically
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solid‚ liquid and gas were determined. Introduction The wavelength of a sinusoidal wave is the spatial period of the wave—the distance over which the wave’s shape repeats. It is usually determined by considering the distance between consecutive corresponding points of the same phase‚ such as crests‚ troughs‚ or zero crossings‚ and is a characteristic of traveling waves and standing waves‚ as well as other spatial wave patterns. Wavelength is commonly designated by the Greek letter lambda. Frequency
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Questions: Differentiate between guided media and unguided media. Differentiate between an analog and a digital electromagnetic signal. What are three important characteristics of a periodic signal. What is the relationship between the wavelength and frequency of a sine wave. Define fundamental frequency. What is the relationship between a signal’s spectrum and its bandwidth. What is attenuation? Define channel capacity. What key factors affect channel capacity? Problems: Figure
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the speed of light‚ either the frequency or the wavelength has to change. The results have shown equivalent values for both of the variables. Thus indicating and proving that the speed of light stays the same after being reflected off a surface. Refraction Refraction is the bending of light through a substance. Different substances bend light at different angles. White light is made up of a full spectrum of colors. Each color has a different wavelength‚ and bends at a different angle. This is the
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is made up of gamma rays‚ X-rays‚ ultraviolet‚ visible‚ infrared‚ microwaves and radio waves. What separates these is the frequency and wavelength of each one. A high frequency‚ which is high energy‚ results in a short wavelengthand vice versa. This makes the frequency and wavelength inversely proportional. Infrared radiation has longer electromagnetic wavelengths than that of
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Introduction: To do the lab exercises for this lesson‚ you need to know a little bit about light. White light consists of all the colors of the rainbow mixed together. Diffraction refers to various phenomena which occur when a wave encounters an obstacle. In classical physics‚ the diffraction phenomenon is described as the apparent bending of waves around small obstacles and the spreading out of waves past small openings. Isaac Newton thought that light must be a particle because particles of light
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regarding tsunamis. Survey the site. A. Select the five facts about tsunamis that were the most interesting or surprising to you. Make a list of your facts. 1. A tsunami is made up of a series of traveling ocean waves of extremely long wavelength. 2. They are triggered by earthquakes and undersea volcanic eruptions and deep sea landslides. 3. The wave shape changes and the height increases as it approaches the coastline. 4. Far field tsunamis have a long travel time so it is
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the detector. The Jump Start exercises below will help you review frequency‚ wavelength‚ pitch‚ and the Doppler effect. Jump Start 1. What type of wave is a sound wave? A sound wave is a longitudinal waves. 2. Define wave frequency. Wave frequency is the number of crests that pass through at a specified time. 3. What is pitch? A pitch is the sound or sensation of the frequency. 4. Sketch one wavelength of a longitudinal wave. Exploration 1: A Wave Source Moving Towards a Detector
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resonances. In this lab we focused primarily on using standing sound waves (compressional waves) created by tuning forks in order to determine the speed of sound in air in a tube when it reaches resonance. v=λf v speed of sound in a medium (m/s) wavelength of the waves (m) frequency of the sound source vibrations (Hz)
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by which the wavelength and the velocity of the radiation are reduced with respect to their vacuum values: The speed of light in a medium is v = c/n‚ where c is the speed in vacuum.[1] Similarly‚ for a given vacuum wavelength λ0‚ the wavelength in the medium is λ=λ0/n. This implies that vacuum has a refractive index of 1. Historically other reference media (e.g.‚ air at a standardized pressure and temperature) have been common. Refractive index of materials varies with the wavelength. This is called dispersion;
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