Relationship of Spectra
Drawing a Plot betwean a signal’s intensity or amplitude as a function of wavelength or frequency is a simple method of representing spectra. Depending on the availability of different data and the intended use of the study, spectra can be drawn in following different ways:
A LINE SPECTRUM:
A line spectrum is a straightforward illustration that displays the intensity of spectral lines at specific wavelengths.
Uses:
- For atomic or molecular spectra, it is frequently employed.
CONTINUOUS SPECTRUM:
The intensity of the spectrum is displayed as a continuous function of wavelength or frequency in a continuous spectrum.
Uses:
- It is frequently employed for thermal spectrum or blackbody radiation.
POWER SPECTRUM:
This displays how energy or power is distributed across various frequency bands.
Uses:
It is frequently employed
- in communication engineering
- and signal processing.
FOURIER SPECTRUM:
After a signal has undergone a Fourier transform, its frequency components are displayed in a Fourier spectrum.
Uses:
- It is frequently employed for frequency domain signal analysis.
SPECTROGRAM:
A spectrogram is a two-dimensional depiction of a spectrum that demonstrates how a signal’s intensity fluctuates with frequency and over time.
Uses:
- Used for the analysis of music and speech.
WIGNER SPECTRUM:
A signal’s energy is dispersed in both the time and frequency domains in this time-frequency form known as a signal’s Wigner distribution.
Uses:
- Used in quantum mechanics and signal processing.