# Laplace Transform

1. Aug 11, 2010

### shankarnus

Hi guys..:)

I have a doubt regarding laplace transform.
can anyone tel me... what is the physical significance of sigma+jw in it...?
what interpretations we can make from sigma and jw in control theory....?

2. Aug 11, 2010

### Char. Limit

Well, do you mean this?

$$\sigma + j \omega$$

Here, $\sigma$ is the real part and $\omega$ is the imaginary part of a complex number...

3. Aug 11, 2010

### shankarnus

First thank u soo much for ur kind reply...:)

ya the same...i need to know the physical significance of it...:)

for why we r goin for it...:)

4. Aug 11, 2010

### shankarnus

k...if sigma=4 and then omega=5 rad..

then wat we can say from it...? wat does it indicate