PPT-Optical Instruments Physics 2415 Lecture 34

Michael Fowler UVa Todays Topics The lensmakers formula Magnifying power Lens combinations ray tracing telescopes Refraction at a Spherical Surface Rays close to the axis paraxial will focus to an image inside the glass. O Box 603 Beijing 100190 China Department of Biomedical Engineering Washington University St Louis 63130 Missouri USA lizyaphyiphyaccn Abstract Optical bistability at nanoscale is a promising way to realize optical switching a key component of integr Physics 111 Fall 2007 1. A narrow beam of ultrasonic waves reflects off the liver tumor shown on the right. The speed of the wave is 10.0% less in the liver than in the surrounding medium. Determine An introduction to the course. What does. . Physics. . have to do with. . Music. ?. 1. Physics is a search for understanding of the natural world – it provides a . Quantitative theory for sound and the nature of what we call musical sound. . Michael Fowler, . UVa. Today’s Topics. A bit more about mirrors…. Refraction. Lenses. Ray tracing to locate image. Concave Mirror Focusing Sunlight. This solar collector is really many small flat mirrors, but equivalent to a concave mirror focusing parallel rays to a point half way from the center of the mirror to its center of curvature.. 1. Today we will.... Learn how combinations of lenses form images. Thin lens equation & magnification. Learn about the compound microscope. Eyepiece & objective . Total magnification. Learn about limits to resolution. Michael Fowler, . UVa. Today’s Topics. Huygens’ principle and refraction. Snell’s law and applications. Dispersion. Total internal reflection. Huygens’ Principle. Newton’s contemporary Christian Huygens believed light to be a wave, and pictured its propagation as follows: at any instant, the wave front has reached a certain line or curve. From every point on this wave front, a . Michael Fowler, UVa. Today’s Topics. Continuous charge distributions: line of charge. Visualizing the field: lines of force. Electron moving in a field. Electric dipoles. Superposition. The . total electric force . Michael Fowler, . UVa. Today’s Topics. The wave equation. Energy and power of waves. Superposition. Standing waves as sums of traveling waves. Fourier series. Harmonic Waves. A simple harmonic wave has sinusoidal form:. 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. . Michael Fowler, . UVa. Today’s Topics. Multi-slit interference. The diffraction grating: spectra. Waves and particles, more diffraction. Radio astronomy. Light Intensity Pattern from Two Slits. We have two equal-strength rays, phase shifted by. Michael Fowler, . UVa. Today’s Topics. Mention of AC. Semiconductors and superconductors. Battery . emf. , internal resistance. Series and parallel resistances. Kirchhoff’s rules. AC and DC. Batteries. My current research includes . Photonics, Optics, Electronics, Sensing, Nano- and microscale devices, Correlation between chemical, magnetic, electrical and optical . signals.. Condensed . matter . physics. Michael Fowler, . UVa. Today’s Topics. Electric motors and galvanometers. Ratio of charge to mass for an electron. Hall Effect. Mass spectometry. Reviewing Essential Facts:. The force on an element of current in a wire in a magnetic field is:. Michael Fowler, . UVa. Today’s Topics. General form of Faraday’s Law. Self-Inductance. Mutual Inductance. Energy in a Magnetic Field. Faraday’s Law: General Form. A changing magnetic flux through a loop generates an emf around the loop which will drive a current. The emf can be written:.