PPT-Standing Waves, Beats, and Group Velocity

Group velocity the speed of information Groupvelocity dispersion Superposition again Standing waves the sum of two oppositely traveling waves Beats the sum of two different frequencies 1. Sections 9.3 and 9.4. Key Terms. Beat. Beat Frequency. Resonant Frequency. Resonance. Beats. The when tapping your toes “to the beat”, you are actually experiencing the rhythm of the music.. An acoustical . Introduction to Physics II. . Class 3 – . Outline:. Ch. 21, sections . 21.1-21.4. The . Principle of Superposition . Standing . Waves . Nodes . and Antinodes . Musical . Instruments. Class 3 – . Beats. Oscillation of . Frequency. . From Pain. 2A. 0. Different amplitudes. Velocity of the envelope .  Group Velocity . Dispersive Medium. Non-dispersive Medium. Normal dispersion. Anomalous dispersion. Acoustical Beat. Periodic change in sound intensity caused by interference between two nearly identical sound waves. They occur when the frequency of the 2 waves is nearly identical. You hear beats as a change in loudness, from soft to loud. T. ypes of wave interactions. Reflection. Refraction. Diffraction. Interference. Reflection. The bouncing back of a wave when it hits a surface.. * NOTE: When waves hits a substance some of it is transmitted and some of it is reflected.. Standing waves. Quantum energy . of colors . Bohr Model . (particle picture). Assumptions. Nuclear model. Discrete electron orbits n = 1,2,3,... Light absorbed/emitted as quantum. . of energy when electron jumps orbit. 1-d and 2-d waves. Wavefront. :. The actual 2-d wave . that we see moving. Ray:. The “vector”, drawn perpendicular to the . wavefront. , that shows the direction in which the wave is propagating (. for . two identical waves traveling in opposite directions.. .  Snapshots . of the blue and the green waves and their red sum shows a wave that appears to not be traveling..  Because . the resultant red wave is not traveling it is called a . Want to learn how to sell beats using Google Adwords. Follow this step by step guide and start your ads today. Visit: https://www.trafficforbeats.com/how-to-sell-beats-with-google-ads/ Periodic Motion. Motion that repeats in a regular cycle is called . periodic motion. . . The revolution of a planet about its sun is an example of periodic motion. The highly reproducible period (T) of a planet is also called its year.. Michael Fowler, . UVa. Today’s Topics. Dimensions. Wave types: transverse and longitudinal. Wave velocity using dimensions. Harmonic waves. Dimensions. There are three fundamental units in mechanics: those of mass, length and time. . Measuring Waves: Variables Recap. Frequency. . ( f ). # of waves passing a point in 1 second. SI unit: Hertz (Hz). shorter wavelength .  higher frequency  higher energy. 1 second. Range for human hearing =. water. waves.... 4/5/2019. Physics 214 Fall 2010. 2. 1S-13 Slinky on Stand. Creating longitudinal compression waves in a slinky. What happens when you pull back and release one end of the slinky . ? . Table of Contents. Concise Marketing Overview of the Product & its role in the Market…………………………………………………………………………….…3. Current Product’s competitive position……………...…………………….…4.