Light travels at its fastest in what medium?
Vaccuum Free space Vacuum technology Perfect vacuum Hard Vacuum Existence of the vacuum Vacuum of free space Vacuum (outer space) Vacume Vacuums Vaccum In vacuo Vacuum Physical vacuum Torricellian vacuum Evacuated space Hard vacuum Partial vacuum Vacuum (space) Space vacuum Classical vacuum Vacua Vacuum Technology Vacuo
vacuo classical vacuum physical vacuum existence of vacuum vacume vaccum space vacuum vacua evacuated space vacuum space vacuum technology vacuum of free space in vacuo torricellian vacuum vacuum vaccuum free space perfect vacuum hard vacuum vacuums partial vacuum vacuum outer space
vacuum
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Vacuum