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© Boardworks Ltd of 31 KS4 Physics Diffraction, Interference and Resonance
© Boardworks Ltd of 31 Contents Diffraction, Interference and Resonance Diffraction Interference Standing waves Summary activities Natural frequency
© Boardworks Ltd of 31 The ripple tank A ripple tank is a device used to study the behaviour of waves, because all waves behave in a similar manner. A ripple tank produces water waves that can be reflected, refracted and diffracted. paddle vibrates to produce waves
© Boardworks Ltd of 31 Reflection and refraction paddle What do you think will happen if a barrier is placed in front of the water waves? If it is a plane barrier then the waves are reflected. barrier What do you think will happen if a block is submerged in the ripple tank? The change in depth of the water causes a change in speed of the waves – they are refracted.
© Boardworks Ltd of 31 Barrier with small gap What do you think will happen if a barrier with a gap in it is placed in front of the water waves? It depends upon the size of the gap. If the gap is smaller than the wavelength of the waves what do you think will happen? The waves are reflected by the barrier.
© Boardworks Ltd of 31 Barrier with wavelength-sized gap What will happen if the width of the gap in the barrier is similar in width to the wavelength of the waves? Circular waves are produced. This effect is known as diffraction.
© Boardworks Ltd of 31 Barrier with large gap What will happen if the width of the gap in the barrier is larger than the wavelength of the waves? The waves pass through the gap unchanged apart from slight diffraction of the waves near their ends.
© Boardworks Ltd of 31 Effect of diffraction… How can the teacher in the corridor hear the school band even though he isn’t in the hall?
© Boardworks Ltd of 31 Effects of diffraction When you are in a room, why can you hear people in the corridor even though you can’t see them? Light and sound are both waves. Waves travel in straight lines. Sound waves have a wavelength similar in magnitude to the width of the doorway and so diffraction occurs. Light waves have a much shorter wavelength than sound waves and are not diffracted by the doorway.
The Behavior of Waves. Reflection Reflection occurs when a wave strikes an object and bounces off of it.Reflection occurs when a wave strikes an object.
Chapter 20. What do you think of when you hear the word wave? Write a brief description of what you know about them.
Copyright © Houghton Mifflin Harcourt Publishing Company Unit 3 Lesson 2 Interactions of Light.
Chapter 17 Mechanical Waves and Sound. Chapter 17 *Mechanical wave- disturbance in matter that carries energy from one place to another *Mechanical wave-
J. Pulickeel SPH3U1 January Wave Behavior What type of waves do not travel through a medium? What types of waves travel through a medium? Name.
Waves & Sound A. Waves 1. The nature of waves a. A wave is a rhythmic disturbance that transfers energy. b. All waves are made by something that vibrates.
Chapter 10 Waves. Chapter 1o Section 1 The Nature of Waves.
Principles of Physics. Boundary Where 2 media meet Where wave conditions change Reflection, transmission, or both can occur.
Waves, Sound, and Light Chapter 1. Bell Work 1.Name two ways you can apply force to a soccer ball. 2.Name two ways the force you apply can change the.
© Boardworks Ltd of 20 © Boardworks Ltd of 47 KS3 Physics 8K Light.
WAVES. Waves can be… Water waves Sound waves Light waves Earthquake waves Waves in a slinky Stadium waves.
Introduction to Waves Definition of wave A periodic disturbance which travels through a medium from one point in space to the others. Wave motion means.
Properties and Characteristics. What do we know about EM waves in general? They are ALL EnergyRadiation! Non-mechanical Transverse waves –They do not.
Of. and a to the in is you that it at be.
Thin Film Interference AP Physics B Montwood High School R. Casao.
Chs. 17 & 18 - Waves III. Wave Behaviors Reflection Refraction Diffraction Interference.
Introduction to Waves Auto slide change for this page, WAIT…..
What are waves? Def. - Disturbances that carry energy from place to place, through matter or space.
High Frequency Words List A Group 1. the of and.
Chapter 20 Sound. The sound waves that most humans cannot hear are a.infrasonic. b.ultrasonic. c.Both of these. d.None of the above, for young people.
True or False? 20 questions. Question 1 Sound is a transverse wave False its longitudinal!
Waves and Sound An Introduction to Waves and Wave Properties.
The. of and a to in is you that it he was.
29 Reflection and Refraction When waves interact with matter, they can be reflected, transmitted, or a combination of both. Waves that are transmitted.
Refraction Refraction of Water Waves Light Rays in Glass Atmospheric Refraction Apparent Depth Refraction is responsible for why objects look bent in water.
Diffraction around an edge and through an aperture Huygens’ principle is consistent with diffraction: The larger the wavelength with respect to the aperture.
January 23 Physics. In: What one change have you noticed in 2 dimensional waves from one dimension?
Electromagnetic Waves G1 – The nature of EM waves and light sources.
For an eye perfectly in focus, light from a distant star will be imaged on the retina. If the person is ‘looking’ straight at the star, then it will be.
Waves Energy is sometimes transferred from place to place by traveling in waves. Sound and light travel in waves. Some substances transport energy through.
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