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Which mechanism limits achievable resolution during multiphoton laser microscopy?

A)Two-photon absorption saturation effect
B)Increased Rayleigh scattering wavelength
C)Spontaneous emission amplification dominance
D)Stimulated Raman scattering amplification limitation

💡 Explanation

Two-photon absorption can prematurely deplete excitation at increased intensities because the two-photon absorption saturation effect limits population inversion. Therefore, the resolution is limited rather than enhanced, because excited state saturation occurs nonuniformly causing artifacts.

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