How are the Stokes Lines Formed? What are its Special Features? | Physics Animated Video

The intensity of Stokes line is always greater than the corresponding Anti-stokes Line. The different processes giving rise to Rayleigh, Stokes and Anti-stokes lines are shown animation.
When a system interacts with a radiation of frequency neu not, it may make an upward transition to a virtual state. A virtual state is not one of the stationary states of the molecule. Most of the molecules of the system return back to the original state from the virtual state which corresponds to Rayleigh scattering. A small fraction may return to states of higher and lower energy giving rise to Stokes line and Anti-stokes line respectively.

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