Http://h2physics.org/?cat=49.

Slides:



Advertisements
Similar presentations
Copyright © 2009 Pearson Education, Inc. Chapter 35 Diffraction and Polarization.
Advertisements

The waves spread out from the opening!
The Wave Nature of Light
Instead of shining monochromatic light (e.g. a laser) through a diffraction grating, what would happen if we shone a polychromatic light source (e.g. white.
Copyright © 2009 Pearson Education, Inc. Lecture 3 – Physical Optics b) Diffraction.
Problem no 1 Light of wavelength 633 nm is incident on a narrow slit . The angle between the 1 st minimum on one side of the central maximum and the 1st.
Double Slit Diffraction Physics 202 Professor Lee Carkner Lecture 27.
Lecture 33 Review for Exam 4 Interference, Diffraction Reflection, Refraction.
Lecture 30 Friday, April 17 Review two slits, gratings Thin Film Interference.
Spectra PHYS390 (Astrophysics) Professor Lee Carkner Lecture 4.
Physics 1402: Lecture 35 Today’s Agenda Announcements: –Midterm 2: graded soon … »solutions –Homework 09: Wednesday December 9 Optics –Diffraction »Introduction.
Double Slit Diffraction Physics 202 Professor Lee Carkner Lecture 27.
Fig Interference diagrams for N equally spaced very narrow slits. (a) N = 2 slits (b) N = 8 slits (c) N = 16slits.
PHY 1371Dr. Jie Zou1 Chapter 38 Diffraction and Polarization (Cont.)
Double Slit Diffraction Physics 202 Professor Lee Carkner Lecture 27.
Copyright © 2012 Pearson Education Inc. PowerPoint ® Lectures for University Physics, Thirteenth Edition – Hugh D. Young and Roger A. Freedman Lectures.
Diffraction Applications Physics 202 Professor Lee Carkner Lecture 28.
Example: What is the ratio of the irradiances at the central peak maximum to the first of the secondary maxima?
Diffraction.
Lab15_Slides Diffraction Grating
Polarization Diffraction Hydrogen Atom Spectrum a Polarized Beam Brewster’s law Diffraction Pattern, Single Slit, double slit Diffraction Grating Circular.
Principal maxima become sharper Increases the contrast between the principal maxima and the subsidiary maxima GRATINGS: Why Add More Slits?
PHYS 430/603 material Laszlo Takacs UMBC Department of Physics
Electromagnetic Waves G3 Two Source Interference of Waves G4 The Diffraction Grating G5 X-Ray Diffraction.
The Hong Kong Polytechnic University Optics 2----by Dr.H.Huang, Department of Applied Physics1 Diffraction Introduction: Diffraction is often distinguished.
The waves spread out from the opening!
Diffraction gratings let us measure wavelengths by separating the diffraction maxima associated with different wavelengths. In order to distinguish two.
Light of wavelength passes through a single slit of width a. The diffraction pattern is observed on a screen a distance x from the slit. Q double.
diffraction (Physical optics)
Difference of Optical Path Length Interference Two waves One wave Many waves Diffraction.
Unit 12: Part 1 Physical Optics: The Wave Nature of Light.
Diffraction by N-slits. Optical disturbance due to N slits.
DIFFRACTION DIFFRACTION
Diffraction by N-slits. Optical disturbance due to N slits.
Chapter 24 The Wave Nature of Light
Today’s Lecture Interference Diffraction Gratings Electron Diffraction
Diffraction at a single slit a = λ Semi circular wave fronts a = 2 λ First minima & maxima become visible a = 4 λ Diffraction is the spreading of wavefronts.
Young's double-slit experiment
Double the slit width a and double the wavelength
If a single slit diffracts, what about a double slit?
DIFFRACTION DIFFRACTION
Diffraction Gratings Diffraction Grating Analysis
Diffraction Topic 13.5 Outcomes You will describe, qualitatively, diffraction, interference and polarization You will describe, qualitatively, how.
Chapter 35-Diffraction Chapter 35 opener. Parallel coherent light from a laser, which acts as nearly a point source, illuminates these shears. Instead.
Q35.1 Two sources S1 and S2 oscillating in phase emit sinusoidal waves. Point P is 7.3 wavelengths from source S1 and 4.3 wavelengths from source S2. As.
Wave theory predicts diffraction of light (the spreading of light into a region behind an obstruction), but this is not easily observed unless the obstruction.
Diffraction Gratings.
Geometry of Young’s Double Slit Experiment
FRAUNHOFFER DIFFRACTION AT DOUBLE SLIT
Diffraction Grating Resolving Power
Diffraction Gratings.
Concept Questions with Answers 8.02 W14D2
Light Through a Single Slit
A. Double the slit width a and double the wavelength λ.
Chapter 35-Diffraction Chapter 35 opener. Parallel coherent light from a laser, which acts as nearly a point source, illuminates these shears. Instead.
X Ray Diffraction © D Hoult 2009.
Example: 633 nm laser light is passed through a narrow slit and a diffraction pattern is observed on a screen 6.0 m away. The distance on the screen.
A. Double the slit width a and double the wavelength l.
Lecture 33 Longitudinal and transverse wave, diffraction
Diffraction Deriving nl = d sin q.
Diffraction Grating.
If a single slit diffracts, what about a double slit?
LEAD Tutors/Peer Instructors Needed!
DIFFRACTION OF LIGHT DIFFRACTION OF LIGHT.
Max. max Figure 37.4 (a) Constructive interference occurs at point P when the waves combine. (b) Constructive interference also occurs at point Q.
Electromagnetic spectrum & visible portion
Unit 2 Particles and Waves Interference
Bragg Diffraction 2dsinq = nl Bragg Equation
The waves spread out from the opening!
Presentation transcript:

http://h2physics.org/?cat=49

*Or 750 nm, or 800 nm, depending on who is observing. Example: the wavelengths of visible light are from approximately 400 nm (violet) to 700 nm (red). Find the angular width of the first-order visible spectrum produced by a plane grating with 600 slits per millimeter when white light falls normally on the grating. 700 nm* 400 nm angle? *Or 750 nm, or 800 nm, depending on who is observing.

Example: the wavelengths of visible light are from approximately 400 nm (violet) to 700 nm (red). Find the angular width of the first-order visible spectrum produced by a plane grating with 600 slits per millimeter when white light falls normally on the grating. Interference Maxima: First-order violet:

First-order red: 10.9

Application: use of diffraction to probe materials. La0.7Sr0.3Mn0.7Ni0.3O3 La, Sr Mn, Cr

Application: use of diffraction to probe materials. La0.7Sr0.3Mn0.7Ni0.3O3 La, Sr Mn, Cr Shoot a beam of x-rays or neutrons at an unknown material. The x-rays or neutrons diffract. Positions of peaks tell you what sets of planes exist in the material. From this you can infer the crystal structure. Intensities of peaks tell you atoms lie on the different planes, and where they are located on the planes.

Application: use of diffraction to probe materials. La0.7Sr0.3Mn0.7Cr0.3O3 (011) & (003)