Register to reply

Impedence and reflection

by lavster
Tags: impedence, reflection
Share this thread:
lavster
#1
Dec8-13, 01:57 PM
P: 214
why does a change in impedance causes reflection? I know that R=(Z2-Z1)/(Z1+Z2), but what is it that makes the wave be reflected?

thanks
Phys.Org News Partner Physics news on Phys.org
Physicists unlock nature of high-temperature superconductivity
Serial time-encoded amplified microscopy for ultrafast imaging based on multi-wavelength laser
Measuring the smallest magnets: Physicists measured magnetic interactions between single electrons
DaleSpam
#2
Dec8-13, 05:10 PM
Mentor
P: 16,976
Basically it comes from energy conservation. At an interface of difference impedances not all of the energy will be transmitted beyond the interface. Since energy must be conserved, whatever is not transmitted must be reflected.
Claude Bile
#3
Dec13-13, 05:42 AM
Sci Advisor
P: 1,474
An alternate, but equivalent explanation to Dale's, is that reflection occurs so as to satisfy the boundary conditions at the interface.

Claude.


Register to reply

Related Discussions
Impedence transfer? Engineering, Comp Sci, & Technology Homework 2
Reactance and Impedence Introductory Physics Homework 3
WHat is impedence....? Introductory Physics Homework 4
Impedence Matching Advanced Physics Homework 0
Why is impedence complex? Mechanical Engineering 7