Study_Guide_2 - Fernanda Velasco ASTR 116 - 21220...

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Fernanda VelascoASTR 116 - 2122004/30/2020Study Guide 2Chapter 41.Definitions:a.Electromagnetic Spectrum:The whole range of different wavelengths of lightb.Speed of Light:The speed of light in a vacuum is 186,282 miles per second(299,792 kilometers per second), and in theory nothing can travel faster thanlight.c.Photons:always travel at the speed of light, and they carry energyd.Wavelength:the distance between successive crests of a wave, especiallypoints in a sound wave or electromagnetic wave.e.Frequency:Frequency is the rate at which an entity, such as a star, completescycles of rotation. The frequency of a wave refers to how many times it oscillatesin a given timef.Amplitude:the angular distance of a celestial object from the true east or westpoint of the horizon at rising or setting.g.Wave Speed:Wave speed is the speed at which a wave travels. Wave speed isrelated to wavelength, frequency, and period by the equation wave speed =frequency x wavelength. The most commonly used wave speed is the speed ofvisible light, an electromagnetic wave.2.Describe the properties of waves and particlesWave properties dominate at lowenergy, equivalent to long wavelength and small frequency, e.g. radio waves. Particleproperties dominate at high energy, equivalent to short wavelength and high frequency,
3.Explain what the Doppler Effect is. What is the red shift and the blue shift
4.What is the energy of a photon?
Which has more energy: violet light vs. red light?5.What is the three purposes of a telescopelight gathering, resolution and
magnification6.Describe the two major types of telescopes

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Term
Fall
Professor
Armale,R
Tags
Fernanda Velasco

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