An oscillating one of these tuned closely to the transition frequency of a spectral line can give rise to the Autler-Townes effect.
An oscillating one of these tuned closely to the transition frequency of a spectral line can give rise to the Autler-Townes effect. The presence of one of these induces birefringence in the Pockels effect and the Kerr effect, and its splitting of spectral lines is observed in the (*) Stark effect. The energy density associated with it is equal to one-half, times the permittivity of free space, times the square of its own magnitude. It can also be expressed as being equal to the product of k and q over the square of r. For 10 points, identify this entity which surrounds a charged object, measured in newtons per coulomb and denoted E.
An oscillating one of these tuned closely to the transition frequency of a spectral line can give rise to the Autler-Townes effect.
{electric field} [prompt on {E} or the {E} field]