That's not even close to correct.okami11408 said:eg. cos(2pi(-f)t)=-cos(2pi(f)t)
The concept of negative frequencies makes sense for complex or quadrature data, that is, when you consider both sine and cosine components impressed on a carrier according tookami11408 said:Negative frequency is nothing but phase reversal.
eg. sin(2pi(-f)t)=-sin(2pi(f)t)
Negative frequency in analysis of the s domain and w domain refers to frequencies that are represented by negative values on the imaginary axis. In the s domain, negative frequencies are used to represent signals that are decaying or decreasing over time. In the w domain, negative frequencies are used to represent signals that are rotating in the opposite direction from the positive frequencies.
In the s domain, negative frequencies are represented by a negative sign before the frequency variable, such as -ω. In the w domain, negative frequencies are represented by a negative value on the imaginary axis, such as -jω.
Negative frequencies are important to consider because they can provide valuable information about the behavior of a system. In some cases, negative frequencies may be more relevant to the behavior of a system than positive frequencies.
Negative frequencies can affect the transfer function in the s domain and w domain by introducing poles and zeros at negative frequencies. This can change the overall behavior of the system and may need to be taken into account when analyzing or designing a system.
No, negative frequencies cannot be physically measured. They are a mathematical concept used to represent certain signals and behaviors in the s domain and w domain. In reality, signals and frequencies can only have positive values.