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chapter 15 sound review answers.notebook May 20, 2015 1. v=d/t 2. v=f*lambda 3. T=1/f Beat freq= f2f1 don't need this for test 331 m/s 3.00 x 108 m/s 2 Freq Longitudinal 1 Standing Waves 13 Decibels 5 Loudness 3 Doppler 8 Interference 7 Rarefaction 11 Compression 12 Hz 6 Pitch 4 Echo 9 Beats 10 Page 3 1.2 9. 4 2.2 10. 1 3. 3 4. 1 5. 4 6. 3 7.4 8.1 Mult Ch 1D 2 C 3E 4A 5B 6B 7A 8D chapter 15 sound review answers.notebook May 20, 2015 about 1000 meters Doppler shift is shift in frequency and wavelength that occurs when a source of waves is moving relative to an observer of the waves chapter 15 sound review answers.notebook May 20, 2015 Since the light from stars in other galaxies is Doppler shifted to lower frequencies, we infer the universe's rapid expansion. This is referred to as Doppler "redshift". Red is lower frequency lower frequency higher frequency Chapter 16 em spectrum start.notebook May 20, 2015 Electromagnetic Waves (light) are a TRANSVERSE waves. Electromagnetic Waves are created by vibrating charges Chapter 16 em spectrum start.notebook May 20, 2015 The Electromagnetic Spectrum color of this? Chapter 16 em spectrum start.notebook Light is so ................... In one second, it can go around the Earth 7.5 times! speed of light in a vacuum = c = 3.00 x 108 m/s All types of electromagnetic radiation have the same speed in a vacuum Xrays, Ultraviolet, gamma, infrared, visible light, radio waves, microwaves https://www.youtube.com/watch?v=Wp20Sc8qPeo&feature=relmfu May 20, 2015 Chapter 16 em spectrum start.notebook May 20, 2015 When light waves encounter a new medium, there are 3 possibilities: 1) absorption 2) reflection 3) transmission Absorption of light occurs due to the atoms' natural frequencies matching the frequency of light being absorbed. In a basic sense, the atoms' nuclei pick up the light's vibrational energy and that energy is now INTERNAL Energy (Q) This is guy is getting HOT Reflection occurs when the electrons on the outside of atoms can absorb the light but the nuclei don't have natural frequencies matching the light's frequency, so the electron reemits the light back out. Loosely held electrons are very efficient light reflectors. This is why polished metals make good reflectors. Chapter 16 em spectrum start.notebook May 20, 2015 Transparent Material Measuring the speed of light Euclid and Plato ~300 BCE Thought the act of seeing was active, not passive. The notion was: That when you looked at something, invisible "filaments" emanated from your eyes! Devised a method with lanterns on opposing mountains. Didn't work. Galileo 1640 Ole Roemer Used the variation of in the time it took Io, a moon of Jupiter to transit behind Jupiter. 1676 First success! Michelson 1900 Used a rotating mirror to very precisely determine the amount of time it took light to transit a measured distance. Got the Nobel Prize in Physics! Chapter 16 em spectrum start.notebook May 20, 2015