The real basis is the *uncertainty* principle, which says that you can't simultaneously measure a quantum state in two bases.

This serves to ensure the instrument is level while simultaneously measuring the altitude of the sun.

The instrumentation would then simultaneously measure the amount of energy being reflected back to it from the upper atmosphere.

In classical physics this does not make sense, since any number of properties can be measured simultaneously with arbitrary accuracy.

Musicians simultaneously measure not just the beat but the phrase, the crescendos and innuendoes.

They have simultaneously measured pressure and temperature by using two separate arrays and laying one on top of another.

Two incompatible observables cannot be measured simultaneously; instead they satisfy an uncertainty principle.

Since all possible crystal orientations are measured simultaneously, collection times can be quite short even for small and weakly scattering samples.

The more accurately one measures one, the more impossible it becomes to simultaneously measure the other.

The device can simultaneously measure chlorophyll fluorescence and gas exchange over the same leaf area, in the chamber.