PPT-Introduction to X-Ray Optics, Coherence and Standing Waves

David Attwood University of California Berkeley 1 The short wavelength region of the electromagnetic spectrum 2 n 1 δ iβ δ β ltlt 1 Characteristic absorption edges for almost all elements in this spectral region. Section 9.2. Key Terms. Media Boundary. Free-end Reflection. Fixed-end Reflection. Transmission. Standing Wave. Node. Antinode. Fundamental Frequency/First Harmonic. Harmonics. Overtone. Media Boundaries. 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 – . Lecture 7. Pre-reading. : . §16.1. Standing Waves. Formed through reflection superposition of waves moving in opposite directions. Contains ‘nodes’ (no displacement) and . ‘anti-nodes’ (maximum displacement) . Reflection, Interference, Standing Waves on String. Transverse wave propagation. Wave reflection at a fixed end. :. the restoring force in the boundary material causes an upward pulse to become a downward pulse upon reflection. A) zero everywhere. B) positive everywhere.. C) negative everywhere. D) depends on the position.. Clicker Question. Room Frequency BA. No dependence on amplitude. String pieces are all at turning points! . 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. . Class 3 – . Outline:. Ch. 21, sections . 21.1-21.4. The . Principle of Superposition . Standing . Waves . Nodes . and Antinodes . Musical . Instruments. Class 3 – . Outline:. QuickCheck. . 1.1. 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 . 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.. ?. Why does your debit card have a black strip on . the back?. SLC today. E&M Quiz. 10 questions. 3 MC, 6 written, 1 drawing. Scientists. Electromagnetic Induction, Electromotive force. Magnetic field lines. 18-1 Mechanical waves. In this chapter, we consider only . mechanical waves. , such as . sound waves. , . water waves. , and . the waves transmitting in a guitar’s strings.. . . Elastic mediums. 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 . ? .