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In a magneto-optical trap used for cooling atoms which mechanism limits atomic density?

A)Ferromagnetic dipole-dipole interaction
B)Spontaneous parametric down-conversion
C)Blackbody radiation-induced ionization
D)Vacuum system outgassing limitation

💡 Explanation

The interaction between neighboring atomic dipole moments induces disruptive magnetic fields. This dipole-dipole interaction limits density because induced fields cause instability rather than tighter confinement. Therefore the packing density decreases instead of increases due to collisions.

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