But later the data were reanalysed with algorithms that took into account changes in the mode shapes of the structure — shapes that the structure takes on when
excited at a particular frequency.
Yet so far, star formation historians have mostly relied on other indicators to write their histories:
light at a particular frequency that is typically emitted when giant clouds collapse, heating up in the process and radiating away that heat in the form of specific spectral lines.
This mathematical process identifies individual blips of
action at particular frequencies in particular places, while the Fourier transform just tells you what frequencies are present overall.
A graphene resonator on board could tune to
signals at a particular frequency, the way a cell phone does, but it would be extraordinarily tiny and use very little power.
New research has been carried out on mice that suffered from Alzheimer's dementia to see what the effects were upon exposure to lights that flickered on and off
at a particular frequency.