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Re: [Phys-L] Mesmerizing

On 2013, Sep 15, , at 11:04, Ze'ev Wurman <> wrote:

On 9/15/2013 8:00 AM, brian whatcott wrote:
Actually, it is found that very small amounts of energy applied cyclically, will eventually synchronize devices which share a resonant frequency. Applies to electronic devices too, despite Z'ev's misgivings.

Perhaps a more careful reading would have helped you. All I wrote is that "Much harder to achieve with electronic metronomes." Any coupled systems will affect each other, but it is harder to get mechanical coupling affect electronic gizmos unless they were designed for it (e.g., mechanically coupled tuning capacitor/coil). Read before jumping.

Forum for Physics Educators

Unavoidably easy w/ microphonic tubes. May have been the prob. RP solved by exchanging tubes.

Yes an e-metronome using, for example, a Wien selected tubed oscillators, I suspect, would be subject to mechanical coupling.

bc has encountered the prob. in a more modern radio, and made an e-metronome in the sixties.