Recent content by mix609

which suggests that its pretty useless even if it were possible to communicate ftl coz its like having a cell phone which let's u say "hello" and then self destructs itself and now a brand new phone has to be purchased to say the next word after which it again self destructs and so on... So...

and my other question was: can an entangled photon pair be reused to send information or is it possible not more than once coz when alice measures, the entangled state is destroyed due to the act of measuring?

my question is about the no-communication theorem in quantum mechanics: Assume that i have a pair of entangled photons which are entangled on their polarization. also assume that i send one to alice and another to bob. and alice wants to send a message to bob. no communication theorem states...

Also i was wondering if the back emf from the dc motor could be routed into another circuit using a diode;just like using a flyback diode on an inductor to prevent the sudden build up of counter emf when supply to the inductor is switched off. This must be impossible because if it were true...

thanks all, my doubt has been cleared :)

thanks k^2 So if i were to measure the waveform using an oscilloscope or some other relevant device,i would see that the back emf reading remains close to zero during at least the 1st second of operation of the dc motor after starting it up.

Does the back emf in a dc motor start to appear after a slight delay(say 1 or 2 seconds) after starting up the motor? I have had this simple doubt for a long time.According to the "generator principle" both applied emf and back emf will always exist simultaneously.Also it would be in violation...