young's double slit experiment ppt

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Young's Double-Slit Experiment - A Level Physics

Subject: Physics

Age range: 16+

Resource type: Lesson (complete)

Last updated

11 September 2024

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This resource is a complete lesson that covers Young’s Double-Slit Experiment for the OCR A Level Physics A course. However, it is useful for other exam boards too.

This lesson teaches the following content: -techniques and procedures used for superposition experiments involving light -Young’s double-slit experiment using visible light -λ = ax / D for all waves where a << D -techniques and procedures used to determine the wavelength of light using a double-slit

This lesson includes: -A full presentation including 2 example questions with worked solutions. -A worksheet with model answers, perfect to set as homework. -Clear visual aids and diagrams to simplify complex concepts. -Editable PowerPoint and Word document for easy customisation.

Click on the links below to check out our FREE A Level Physics resources:

Mass, Weight & Force Basics Lesson Net Forces & Equilibrium Lesson Moments & Torques Lesson Drag & Terminal Velocity Lesson Density, Pressure & Upthrust Lesson

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Waves - A Level Physics

This resource includes **11 complete lessons** that cover the topic **Waves** for the OCR A Level Physics A course. Although this resource is designed for the OCR A specification, the content covered is **suitable for other exam boards too.** In total, there are approximately **211 slides/pages** **Lessons Included:** -Progressive Waves -Frequency, Speed & Intensity -Electromagnetic Waves & Polarisation -Reflection & Refraction -Refractive Index & Total Internal Reflection -Diffraction -Superposition & Interference -Two-Source Interference -Young's Double-Slit Experiment -Diffraction Gratings -Stationary Waves **Each lesson includes:** -A full presentation including example questions with worked solutions. -A worksheet with model answers, perfect to set as homework. -Clear visual aids and diagrams to simplify complex concepts. -Editable PowerPoint and Word document for easy customisation. **Click on the links below to check out our FREE A Level Physics resources:** [Mass, Weight & Force Basics Lesson](https://www.tes.com/teaching-resource/mass-weight-and-force-basics-a-level-physics-12812802) [Net Forces & Equilibrium Lesson](https://www.tes.com/teaching-resource/net-forces-and-equilibrium-a-level-physics-12812828) [Moments & Torques Lesson](https://www.tes.com/teaching-resource/moments-and-torques-a-level-physics-12812832) [Drag & Terminal Velocity Lesson](https://www.tes.com/teaching-resource/drag-and-terminal-velocity-a-level-physics-12812835) [Density, Pressure & Upthrust Lesson](https://www.tes.com/teaching-resource/density-pressure-and-upthrust-a-level-physics-12812838)

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Youngs double slit experiment - PowerPoint PPT Presentation

Youngs double slit experiment

... in/~phy1/ michelson interferometer. division of amplitude ... michelson interferometer. observer year arm length (in m) michelson. 1881. 1.2. michelson & morley ... – powerpoint ppt presentation.

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Geometry of Young’s Double Slit Experiment

Published by Austin Anderson Modified over 6 years ago

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Presentation on theme: "Geometry of Young’s Double Slit Experiment"— Presentation transcript:

Waves (in general) sine waves are nice

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THE TEACHING REFLECTION AND ANALYSIS ON INTRODUCING POLARIZERS IN THE YOUNG'S DOUBLE-SLIT INTERFERENCE EXPERIMENT

It is a meaningful exercise that discussing the patterns of interference fringes in case introducing polarizers into the Young's double slit experiment while different combinations. However, “no fixed phase difference,” the commonly seen answer, does not fully understand the essence of the problem. By utilizing Malus's Law and the principle of wave superposition, this paper calculates the resulting contrast after superposition. Quantitative calculations demonstrate that when three polarizers are introduced in Young's double-slit interference experiment, the physical reason for the absence of interference fringes is the existence of a projection phase difference. Moreover, it is emphasized that in this context, the projection phase difference is the determining factor for the presence or absence of interference fringes. The article provides a clear and intuitive physical image, suitable for classroom teaching, displaying the role of the projected phase difference and aiding students in gaining a deeper understanding and application of concepts related to light emission mechanisms, interference, polarization, and the interference of polarized light.

No abstract is available for this article. Click the button above to view the PDF directly.

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Young’s double slit experiment

Jul 28, 2014

150 likes | 482 Views

Young’s double slit experiment. Young’s Double Slit Experiment. YAY!. What is it?. First conducted in 1801 by Thomas Young Light passed through a barrier with two slits (before it usually passed through a single slit to make the light coherent) The light diffracted through each slit

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• many fringes
• wave interference
• unit04 light chp1719
• www studyphysics
• brown edu physics demopages
• high intensity beam

Presentation Transcript

Young’s Double Slit Experiment YAY!

What is it? • First conducted in 1801 by Thomas Young • Light passed through a barrier with two slits (before it usually passed through a single slit to make the light coherent) • The light diffracted through each slit • Created interference pattern • In order to interfere the light that passes through the slit must be of the same frequency and polarization and it must be coherent

Particles vs. Waves Particle Wave The light will diffract and interfere, making many fringes • If light acts as a particle, only two slits will appear on the screen

Why is this important? • This proves light acts not only as a particle, but also as a wave!

is the path length difference. constructive interference destructive interference n = 0, ±1, ±2, ±3, ±4 etc

Equations for the Fringes • λ/s=w/D w • w=λD/s

Many Photon Interference Acquisition Time: .1 sec Attenuation: 3 optical depths Amplification: x1

Single Photon • When a single photon is used, wave interference is still present • It is impossible for a photon to act as a wave as it is can only go through one slit • If one slit is blocked, there is no interference

Important Observations • When path of photon is unknown, fringes are observed • When path of photon is known, fringes are not observed

Summary • Young’s Double Slit Experiment • Fringes were observed under high intensity, as well as with only a single photon.

Conclusion • Single photons behaved the same way as the high intensity beam. • In the double slit experiment, the single photon appeared to interfere with itself – going through both slit simultaneously.

Sources • http://www.studyphysics.ca/newnotes/20/unit04_light/chp1719_light/lesson58.htm • http://dev.physicslab.org/asp/applets/doubleslit/default.asp • http://physics.about.com/od/lightoptics/a/doubleslit.htm • http://www.physics.brown.edu/physics/demopages/Demo/modern/demo/7a5520.htm • The book – Seeing the Light • From Jeff, Jacob, Bryce, Edward, and Julie

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