Lectures on waves - Wave Motion Sound- Wave motion is the...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Wave Motion Sound- Wave motion is the most common type of motion in nature- Light and sound are two types of waves that give us over 99% of information about the world around us- In quantum mechanics you will learn that electrons, atoms and molecules behave as waves! Notes Water Radio Light Types of Waves • There are two main types of waves – Mechanical waves • Some physical medium is being disturbed • The wave is the propagation of a disturbance through a medium • Examples are sound waves, ocean waves Notes – Electromagnetic waves • No medium required • Examples are light, radio waves, x-rays Mechanical and electromagnetic waves are described by the same equations and behave similar to each other General Features of Waves • In wave motion, energy is transferred over a distance • Matter is not transferred over a distance • All waves carry energy but the amount of energy and the mechanism responsible for the transport of the energy differ Real waves – no matter transfer Not real waves – matter transfer Notes Water waves Sand dune waves Mechanical Wave Requirements • Some source of disturbance needed to excite the wave • A medium that can be disturbed must be present • Some physical mechanism through which elements of the edium can influence each other Notes medium can influence each other- Source of disturbance: hand- Medium: guitar string- Influence: tension Mechanical Wave Example • Example: a chain of masses connected by light springs: – If we displace one of the masses, it will start oscillating – Since this mass is connected to a neighboring mass, energy will be transferred to this neighboring mass and it will also start oscillating (remember two coupled oscillators example) – This oscillatory motion of masses will propagate from one mass to another along the chain because all masses are connected to each Notes other – This propagating motion is mechanical wave Pulse on a Rope • Another example of a system that can sustain a mechanical wave is taut rope • You can think of rope as consisting of small pieces each of which has mass and is connected to the neighboring pieces by forces of tension • The disturbance is generated by a flick on one nd of the rope Notes end of the rope • A single bump is formed and travels along the rope – The bump is called a pulse Pulse on a Rope • The rope is the medium through which the pulse travels • The pulse has a definite height (amplitude) • The pulse has a definite speed of propagation along the medium • A continuous flicking of the rope would Notes produce a periodic disturbance which would form a wave Transverse Wave • Consider one small piece (element) of the rope labeled P in the figure • As the pulse passes through this element, it moves up and down but not towards the wall !...
View Full Document

This note was uploaded on 11/22/2010 for the course PHYSICS Physics 7C taught by Professor Ilyakrivorotov during the Winter '10 term at UC Irvine.

Page1 / 56

Lectures on waves - Wave Motion Sound- Wave motion is the...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online