One Stop GATE Forum: complex quantities

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   what exactly do we mean when we say that a quantity is a complex quantity? 
for example,propagation constant, α+iβ ,is a complex quantity 
where 
α, the real part, is the attenuation constant 
β, the imaginary part, is the phase constant , 
why do we call it imaginary and again take it as the phase constant...that too when we are not taking it as a phasor...what has "imaginary" got to do with the phase constant.... 
does a complex number has any meaning in real life...when we are not talking about phasors as in the case of the propagation constant...?

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Roshan Newbie Joined: 03Feb2007 Online Status: Offline Posts: 1	Topic: complex quantities Posted: 03Feb2007 at 5:41pm
	what exactly do we mean when we say that a quantity is a complex quantity? for example,propagation constant, α+iβ ,is a complex quantity where α, the real part, is the attenuation constant β, the imaginary part, is the phase constant , why do we call it imaginary and again take it as the phase constant...that too when we are not taking it as a phasor...what has "imaginary" got to do with the phase constant.... does a complex number has any meaning in real life...when we are not talking about phasors as in the case of the propagation constant...? Post Resume: Click here to Upload your Resume & Apply for Jobs

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Sameer Newbie Joined: 03Feb2007 Online Status: Offline Posts: 1	Posted: 03Feb2007 at 6:11pm
	although ur question is not quite clear bit what i got is: beta is not imaginary for a proper system,if bete itself is imaginary then α+iβ becomes purely real,that means attenuation constant becomes high which does not allow the wave to propgate fully. _________________ "helping others means helping yourself"
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