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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.
© Boardworks Ltd of 31 KS4 Physics Diffraction, Interference and Resonance.
© Boardworks Ltd 2003 IGCSE Waves: Basic Properties.
1 IGCSE Physics Waves. 2 Lesson 5 – Diffraction and the wave equation Aims: To recall and use the relationship between the speed, frequency and wavelength.
© Boardworks Ltd 2003 KS4 Waves: Diffraction, Interference and Resonance.
PHYSICS – General Wave Properties. LEARNING OBJECTIVES Core Demonstrate understanding that waves transfer energy without transferring matter Describe.
Chapter 22 Objectives Describe reflection, refraction, diffraction, and interference. Compare destructive interference with constructive interference.
1 of 9© Boardworks Ltd 2013 Reflection, Refraction and Diffraction.
Comparing Electromagnetic Waves To Water Waves 2 Wave model of light The wave model of light describes waves with a very small wavelength travelling.
Ripple Tank Summary. Why Ripple Tanks : Real waves (sound, light, radiation) are difficult to observe Real waves (sound, light, radiation) are difficult.
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 – The Energy of Waves Section 3 – Wave Interactions pp
McNair Middle School Physical Science. Wave Interactions Reflection Reflection The.
Chapter 1 Section 3 t-catch-the-physics-of-waves.html.
The Behavior of Waves
This is one type of wave…. wave Wave a disturbance that propagates through a material medium or space. Waves transfer energy without the bulk transport.
Waves no matter what type, all have properties. Height is a property of waves no matter if it’s a ripple in a glass or a giant wave at the beach, it can.
Wave Interactions Describe refection, refraction, diffraction, and interference Compare destructive interference with constructive interference Describe.
Wave Characteristics. Terms to Review Parts of a Wave – Crest – Trough – Pulse – Amplitude – Wavelength – Frequency – Period Types of Waves – Mechanical.
Radio Station A - FM network using a radio wave of 93.4 MHz (93.4 ×10 6 Hz) Radio Station B - AM network using a radio wave of 856 kHz a)Calculate the.
Chapter 1 Interactions of waves. Key Terms Reflection Refraction Interference Constructive interference Standing wave Antinode Law of reflection Diffraction.
Reflection happens when a wave bounces back after hitting a barrier. All waves-including water, sound, and light waves-can be reflected.
WAVES Chapter 7 What is a wave A wave is –A rhythmic disturbance –Carries ENERGY but not MATTER.
1 of 6© Boardworks Ltd 2006 Diffraction 19 September, 2015 Objectives Be able to describe what diffraction is and be able to draw diagrams of it. HSW:
R.G. The Professional Development Service for Teachers is funded by the Department of Education and Skills under the National Development Plan Some properties.
11/24/08 Warm Up Draw a wave and label the crest and trough.
Ch. 15 What are waves? -A wave is a traveling disturbance that carries energy from one place to another.
Core Physics – Energy L/O :- To understand diffraction Diffraction Exam Date -
WAVES Essential Questions: What is a wave? How do waves travel? What are the types of waves? What are the properties of waves? What are 4 types.
The behavior of a wave is greatly influenced by the medium in which it is traveling. The wave frequency remains unchanged in different medium. The.
DIFFRACTION & REFRACTION OF WAVES. DIFFRACTION OF WAVES Diffraction: A change in direction or bending of waves as they pass through an opening or around.
Wave Interactions. Reflection The interaction of a wave with a surface it cannot pass through. The interaction of a wave with a surface it cannot pass.
More Waves. Waves Waves are the means by which energy is transferred from one point to another There are two types of waves: transverse and longitudinal.
Wave interactions. Describing waves A crest represents all the high points in a wave. A trough is all the low points in the wave.
Dylan Zywicki th hour. What is a wave? * A wave is any disturbance that transmits energy through matter or empty space. * Some examples are;
WavesSection 3 Reflection, Diffraction, and Refraction How do waves behave when they hit a boundary, when they pass around an edge or opening, and when.
Chapter 21 – The Nature of Sound Section 3 – Interactions of Sound Waves pp
Properties of waves. RIPPLE TANK A ripple tank consists of a rectangular try with glass bottom. This tray is placed approximately at a height equal to.
Nature of Waves pg. 602! A wave is any disturbance that transmits energy through matter or empty space. Example: water waves in the ocean microwaves.
Wave Properties. Reflection When a wave is turned back toward its start point Fixed End – wave hits an obstacle that is rigid and is reflected back inverted.
Wave a disturbance that propagates through a material medium or space. Waves transfer energy without the bulk transport of matter. In order for a mechanical.
Chapter Review Game. Amplitude: tells us how much energy a wave has.
Interactions. What Happen When Light Runs into something? Transparent: Light goes right through and you can see what is on the other side Translucent:
Water Waves Ripple tank experiment Basic set-up for the ripple tank experiment Next Slide Mechanism of producing bright and dark fringes Stroboscope :
Waves Waves as energy Types of waves What exactly is a wave? Definition: A wave is any disturbance that transmits energy through matter or space Waves.
Light and Sound energy. Wave Definition A wave – is something that carries energy though matter or space. Waves transfer energy Energy spreads out as.
Transverse or longitudinal waves transport energy from one point to another. Each particle in the medium vibrates or oscillates, and disturbs the neighbouring.
Spring Constant, K The constant k is called the spring constant. SI unit of k = N/m.
WAVES. OBJECTIVES Relate waves and the transfer of energy. Distinguish between transverse waves and longitudinal waves. Predict the motion of a medium.
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