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Comment Re:Selection bias (Score 1) 241

People who have empathy and consideration for others can make dispassionate decisions when necessary, or at least many of them can.

Psychopaths have empathy, they can just turn it off.
Good point that people with empathy can make dispassionate decissions when needed. I would say intelligent people can do that normally.
Makes me wonder what is so special about psychopaths, maybe that they turn their empathy off more regularly, and more easily?

Comment Re:Just destructive interference? (Score 1) 71

Yes, it is more obvious in classical electrodynamics. For all waves and electromagnetic fields the superposition principle can be applied because the Maxwell equations are linear. This means that if you add any fields or other waves to an incoming wave you can describe the result mathematically as the sum of the incoming wave and whatever you generate.
According to the Maxwell equations the incoming wave is influenced by susceptibility and permeability of the materials it is going through, and by charges and currents. But waves and fields are just added to the fields of it, they do not change the original wave. So to compensate changes in a wave you have to add a wave that compensates the changes, and this wave must be actively adapted to the incoming wave.

Comment Re:Just destructive interference? (Score 1) 71

So "the ability of electromagnetic fields to redirect or scatter waves of energy" means that they just send out electromagnetic waves that interfere with the waves around the object? Was already wondering since when electromagnetic fields can redirect electromagnetic waves. That only works in Star Trek.

Comment Re:More like Gamma-ray devices (Score 2) 113

Well, yes and no, it also depends on the field what term is used. Astronomers always name it gamma radiation, while physicists from the field of elementary particles and accelerators use the term gamma radiation only for radiation coming from the nucleus. X-ray radiation is used to specify the wavelength range, for any other source.

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