Doppler Effect - Microwave Beats

MPEG Movie (3.76 MB w/Sound)

content.gif (1503 bytes)
 Code Number :   3B40.30

Disclaimer:

Reprinted by permission of Dick Berg, University of Maryland, for use on this website.

The demonstrations contained and referenced herein are listed for the purposes of cataloging and describing physics demonstrations which should be conducted only under the direction of a trained instructional support professional or physicist. These demonstrations are not presented for the purpose of being conducted by persons unconnected to this Facility and/or persons not consulting with or being supervised by the recognized instructional support professional or physicist and his/her staff. The University is responsible only for those demonstrations carried out using its own equipment using established safety and scheduling policies, and bears no responsibility for those choosing to use this source material for their own purposes. All demonstrations described and contained herein are public domain, and can also be found in reference materials in libraries, bookstores, and electronic sources.

Further information regarding legal liability in use of demonstrations and labs will be found on the web site Injuries in School/College Laboratories in USA.

The University of Iowa Disclaimers:  University of Iowa Disclaimer All Rights Reserved..

Condition :   Excellent  
Principle :   Doppler Effect Using Microwaves
Area of Study :  Acoustics   
Equipment :   Amplifier, speaker, microwave transmitter and receiver, mirror plate.

 

Procedure :   Set the microwave receiver pointing in the same direction as the transmitter and move just far enough in front of the transmitter to get a faint signal.  As the mirror is moved closer and farther away from the transmitter a beat frequency should be observed that is proportional to the speed of the mirror.
conbot.gif (53 bytes)


   References

Richard W. Cole, "Demonstration Doppler Radar", TPT, Vol. 10, # 7, Oct. 1972, p. 399.

 

S. C. Bloch, W. E. Abare and G. E. Pidick, "Interference-Fringe Counting as an Aspect of Doppler Shift", AJP, Vol. 35, # 3, March 1967, p. 223.



Mail Questions and Comments to:  Dale Stille