Login | Signup now       

Guest

 Click to see how  

HOME | VIDEOS | DOCUMENTS | COLLECTIONS | UPLOAD | BROADCAST | MY ACCOUNT | FEEDBACK | ABOUT

Share  Title: Diffraction

 
iConnect (Beta)   |  Like   |    Sponsor  |   Comment   |    Report  

Related Profiles

If you are an author or an inventor or an individual related to the work displayed in this video, you can click on the 'add me as' button to link your researchusa profile to this entry. Doing so automatically puts you on the iConnect network bringing great visibility to all your related work.

    
 
Article

View Cross Ref (Beta)

Your Edit is Valuable. Editor's names show on Edit pannel.Edit this article  

 

Diffraction is normally taken to refer to various phenomena which occur when a wave encounters an obstacle. It is described as the apparent bending of waves around small obstacles and the spreading out of waves past small openings. Very similar effects are observed when there is an alteration in the properties of the medium in which the wave is travelling, for example a variation in refractive index for light waves or in acoustic impedance for sound waves and these can also be referred to as diffraction effects. Diffraction occurs with all waves, including sound waves, water waves, and electromagnetic waves such as visible light, x-rays and radio waves. As physical objects have wave-like properties (at the atomic level), diffraction also occurs with matter and can be studied according to the principles of quantum mechanics.While diffraction occurs whenever propagating waves encounter such changes, its effects are generally most pronounced for waves where the wavelength is on the order of the size of the diffracting objects. If the obstructing object provides multiple, closely-spaced openings, a complex pattern of varying intensity can result. This is due to the superposition, or interference, of different parts of a wave that traveled to the observer by different paths (see diffraction grating).The formalism of diffraction can also describe the way in which waves of finite extent propagate in free space. For example, the expanding profile of a laser beam, the beam shape of a radar antenna and the field of view of an ultrasonic transducer are all explained by diffraction theory.

 

 
Related Documents
 
Member Documents
 

Keywords
Diffraction  sound  
 
 About This Video
 
 Subject Physics
 Category Demonstration
 Duration 00:05:54
 Views 3145
 Added 26-08-09
 Contributor    reberg
 Add to Favourites
 Report Abuse
 
 Related Videos
 See More

The

 RunTime  00:02:09
 Uploaded  26-12-07
 Views  3309
   
 The physics of sound

Speed

 RunTime  00:04:04
 Uploaded  25-08-09
 Views  3616
   
 Speed of Sound

Ruben's

 RunTime  00:02:48
 Uploaded  25-11-07
 Views  3540
   
 Ruben's Tube

Rijke

 RunTime  moderate
 Uploaded  26-06-12
 Views  1953
   
 Rijke Tube

Audible

 RunTime  moderate
 Uploaded  26-06-12
 Views  1822
   
 Audible Frequency Range

Aerodynamics

 RunTime  00:00:02
 Uploaded  19-10-07
 Views  3725
   
 Aerodynamics

Sound

 RunTime  00:04:44
 Uploaded  25-08-09
 Views  3855
   
 Sound Reflection from Con...

Doppler

 RunTime  00:02:59
 Uploaded  26-08-09
 Views  3456
   
 Doppler Effect

Sound

 RunTime  00:03:31
 Uploaded  25-08-09
 Views  3992
   
 Sound Propagation in Vacu...

Sound

 RunTime  00:03:11
 Uploaded  26-08-09
 Views  4357
   
 Sound Refraction - Sound ...

Music

 RunTime  00:04:43
 Uploaded  25-11-07
 Views  3308
   
 Music Technology

Sound

 RunTime  00:05:03
 Uploaded  24-11-07
 Views  4046
   
 Sound & Vision (Animation...

Reflection

 RunTime  00:09:53
 Uploaded  26-08-09
 Views  3325
   
 Reflection of Pulses

Sound,

 RunTime  00:04:58
 Uploaded  25-11-07
 Views  3568
   
 Sound, Vision & Nanoscien...

MIT

 RunTime  moderate
 Uploaded  07-10-10
 Views  4501
   
 MIT Researcher Joe Pompei...

Chladni

 RunTime  00:08:48
 Uploaded  03-09-09
 Views  3815
   
 Chladni Plates

Sound

 RunTime  00:03:43
 Uploaded  25-08-09
 Views  3218
   
 Sound Resonance

Effect

 RunTime  00:04:09
 Uploaded  12-11-09
 Views  3463
   
 Effect of gas on voice

 Member Videos
 See More

Sound

 RunTime  00:03:11
 Uploaded  26-08-09
 Views  4357
   
 Sound Refraction - Sound ...

Sound

 RunTime  00:03:31
 Uploaded  25-08-09
 Views  3992
   
 Sound Propagation in Vacu...

Audio

 RunTime  00:09:16
 Uploaded  12-11-09
 Views  3893
   
 Audio Spectrograms

Shive

 RunTime  00:08:29
 Uploaded  26-08-09
 Views  3867
   
 Shive Wave Machine - Stan...

Sound

 RunTime  00:04:44
 Uploaded  25-08-09
 Views  3855
   
 Sound Reflection from Con...

Chladni

 RunTime  00:08:48
 Uploaded  03-09-09
 Views  3815
   
 Chladni Plates

Standing

 RunTime  00:09:58
 Uploaded  03-09-09
 Views  3781
   
 Standing Waves in Air Col...

AM,

 RunTime  00:11:47
 Uploaded  03-09-09
 Views  3759
   
 AM, FM and Balanced Modul...

Damped

 RunTime  00:08:41
 Uploaded  24-08-09
 Views  3674
   
 Damped and Driven Oscilla...

Speed

 RunTime  00:04:04
 Uploaded  25-08-09
 Views  3616
   
 Speed of Sound

The

 RunTime  00:10:32
 Uploaded  26-08-09
 Views  3608
   
 The Overtone Series

Vocal

 RunTime  00:08:00
 Uploaded  12-11-09
 Views  3599
   
 Vocal Formants

 

 

Comments | Queries | Clarifications