DIFFRACTION OF LIGHT DIFFRACTION OF LIGHT.

Slides:



Advertisements
Similar presentations
Diffraction and Interference of Light
Advertisements

The Wave Nature of Light Chapter 24. Properties of Light Properties of light include reflection, refraction, interference, diffraction, and dispersion.
4/13/2017 5:04 PM Diffraction © 2007 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be.
The Wave Nature of Light
Diffraction The bending/spreading of waves as they go through gaps or around edges The effect is greatest when gap width is equal to or smaller than the.
When wavefronts pass through a narrow slit they spread out. This effect is called diffraction.
WAVE INTERFERENCE.....
Lesson 6. Diffraction Interference Recall that waves interfere (superposition) in a predictable way. Where two crests meet we have maximum displacement.
Physics 6C Interference of EM Waves Prepared by Vince Zaccone For Campus Learning Assistance Services at UCSB.
Lecture 33 Review for Exam 4 Interference, Diffraction Reflection, Refraction.
Multiple-Slit Interference Uniform slits, distance d apart. Light of wavelength. Screen L away “Thin” slits  compared to d) L y  L >> d then path length.
Interference & Diffraction
Double Slit Diffraction Physics 202 Professor Lee Carkner Lecture 25.
Double Slit Diffraction Physics 202 Professor Lee Carkner Lecture 27.
Diffraction, Gratings, Resolving Power
A wave is a single vibratory disturbance of energy as it propagates through a medium. A pulse is a single disturbance. A pulse on a rope. This is an example.
Physics 6C Interference of EM Waves. Young’s Double Slit Experiment In Young’s double-slit experiment light comes from the left and passes through the.
Diffraction & Interference of Light
Diffraction is the bending of waves around obstacles or the edges of an opening. Huygen’s Principle - Every point on a wave front acts as a source of tiny.
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.
Quantum Theory of Light
Interference of waves.
Chapter 19: Interference & Diffraction Honors Physics Bloom High School Mr. Barry Latham.
AP Physics IV.B Physical Optics Linear Superposition.
Ch 16 Interference. Diffraction is the bending of waves around obstacles or the edges of an opening. Huygen’s Principle - Every point on a wave front.
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.
Example Two identical point sources produce water waves with a wavelength of 0.04 m. The sources are 0.1 m apart. What is the maximum angle for a line.
13.4 Double slit interference. From one source and two gaps 1 st bright fringe 1 st bright fringe central fringe.
6.2 Two slit interference Coherence Two-Slit Interference Thin film Interference.
Q1. You are holding one end of a light string. The other end is attached to a vertical post. The string is under tension so that the speed of waves is.
Young’s Double Slit Experiment.
Chapter 35&36 Interference and the Wave Nature of Light 1.Light as a Wave 2.THE PRINCIPLE OF LINEAR SUPERPOSITION 3.Young's Double-Slit Experiment 4.Diffraction.
Chapter 19-1 Interference of Light. Diffraction HISTORY of the concept of diffraction Begins with the old debate: –Is light a wave –Or is light a particle?
Chapter 19-2 Applications of Diffraction. Diffraction by Reflection Tiny ridges of beetle or CD have spacings only a few hundred nanometers apart Each.
Chapter 19: Interference & Diffraction Honors Physics Bloom High School Mr. Barry Latham.
Young’s Double Slit Contents: Interference Diffraction Young’s Double Slit Angle Distance.
We will now be looking at light via the wave theory. Let’s review Constructive & Destructive Interference: When a source emits sound/light, it radiates.
Young’s Double Slit Contents: Interference Diffraction Young’s Double Slit Angle Distance Single slit Rayleigh Criterion.
CH-27: Interference and the Wave Nature of Light
Double the slit width a and double the wavelength
B. Wave optics Huygens’ principle
Diffraction Gratings Diffraction Grating Analysis
Diffraction Topic 13.5 Outcomes You will describe, qualitatively, diffraction, interference and polarization You will describe, qualitatively, how.
Interference, Diffraction, and Polarization
Interference & Diffraction
INTERFERENCE AND DIFFRACTION
Diffraction and Interference
Ch 16 Interference.
constructive interference. destructive interference.
Diffraction Monochromatic light Polychromatic light
Geometry of Young’s Double Slit Experiment
Young’s Double Slit Experiment.
Interference of EM Waves
The Wave Nature of Light
Diffraction Gratings.
Interference and the Wave Nature of Light
Interference, Diffraction, and Polarization
A. Double the slit width a and double the wavelength λ.
A. Double the slit width a and double the wavelength l.
Physics 1B03summer-Lecture 11
Interference – Young’s Double-Slit Experiment
Two sources S1 and S2 oscillating in phase emit sinusoidal waves.
Interference.
Diffraction.
Diffraction.
Diffraction Monochromatic light Polychromatic light
B. Wave optics Huygens’ principle
Diffraction Grating calculation of light wavelength
Physics 3 – Dec 7, 2017 P3 Challenge –
Chapter 16: Interference and Diffraction
Presentation transcript:

DIFFRACTION OF LIGHT DIFFRACTION OF LIGHT

INTERFERENCE When two light sources interfere with each other. Light intensity is reinforced at bright bands. Light intensity is lost at dark bands

Iridescence- interference of light produced by a thin layer of a substance on a surface

DIFFRACTION Producing an interference pattern with only one light source. Light rays move around a barrier and interfere producing bright bands and dark bands.

DIFFRACTION Ridges in feather diffract white light, separating it into different colors. Small grooves on CD diffract light.

DOUBLE SLIT DIFFRACTION Constructive interference Constructive interference m=0 Destructive interference Destructive interference

FORMULA λ/d = x/L λ = wavelength (m) d = distance between slits (m) X = distance from central maximum to first order bright line (m) L = distance from the slits to the screen (m)

Sample problem First order image X light λ λ λ Central Maximum Light falls on 2 slits that are 1.9 x 10-4cm apart. A first order bright line is formed 22cm from the central maximum. The distance from the slits to the screen is 60cm.

A) Find the wavelength of light L = 60cm =0.6m x = 22cm = 0.22m d = 1.9 x 10-4cm = 1.9 x 10-6m λ/d = x/L λ / 1.9 x 10-6 = 0.22 / 0.6 0.6λ = 4.18 x 10-5 λ = 6.96 x 10-7m

B) What color light is it? Use v = f λ v = 3.0 x 108m/s λ = 6.96 x 10-7m 3.0 x 108m/s = f (6.96 x 10-7m) f = 4.3 x 1014Hz Red light