Dead zones occur when both ϕ and θ equal 90 ∘. (f) Both resonances at ω 0 and 2 ω 0 are employed. Dead zones appear when both ϕ and θ equal 90 ∘. (e) Only resonances at 2 ω 0 are employed. (d) Both resonances at ω 0 and 2 ω 0 are utilized and ϕ = 0 ∘ are dead zones. (c) Only resonances at 2 ω 0 are utilized and ϕ = 0 ∘ are dead zones. For elliptically polarized light the electric field vector rotates at but varies in amplitude so that the tip traces out an ellipse in time at a fixed position z. Light - Wave, Particle, Spectrum: The atoms on the surface of a heated filament, which generate light, act independently of one another. The minimum signal amplitude is 64% of the maximum. Kent Rochford, in Encyclopedia of Physical Science and Technology (Third Edition), 2002. (b) Both resonances at ω 0 and 2 ω 0 are used. 19 20 Light is said to be partially polarized when there is more power in one of these streams than the other. The minimum signal amplitude is 25% of the maximum. Unpolarized light can be described as a mixture of two independent oppositely polarized streams, each with half the intensity. (e) and (f) Linearly polarized light α = 0 ∘. (c) and (d) Circularly polarized light α = 45 ∘. (a) and (b) Ellipticity of the light polarization is adjusted to obtain the maximum amplitude of the resonance signal in each magnetic-field direction. The amplitudes of resonance signals are represented in percent of the maximum amplitude. The six contour plots based on the theoretical simulation results from Eqs. ( A3) show the dependence of the resonance signal amplitudes on magnetic-field direction.
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