Recent content by Michael Lazich

  1. M

    A KIC 8462852 (dipping again in March 2018)

    No kidding. My posts were never about any sort of natural explanation for the observed light curve. Nor are they meant as a serious argument for an unnatural explanation. Hence my original reference to a Black Monolith. Which is a reference to the movie 2001, where a spinning alien structure...
  2. M

    A KIC 8462852 (dipping again in March 2018)

    Actually, the cross sectional area of a spinning disk could be said to have the "general" shape of the light curve, and that for only a single rotation. The light curve from a star with such a spun disk in front of it would actually look like the inverse of what was observed from KIC 8462852...
  3. M

    A KIC 8462852 (dipping again in March 2018)

    I've been struck how the lower left curve looks like what could be produced by a spinning disk or other object... Black Monolith anyone...? ;)
  4. M

    NASA NASA to Announce Mars Mystery Liquid water today

    "4] We can send people to Mars and they will have resources to live." Not just live; with the presence of a wide variety of perchlorates, it raises the possibility of making solid rocket fuel for a return trip, or further deeper exploration without bringing fuel from home (Earth that is)...
  5. M

    Insights Can I Send a Signal Faster than Light by Pushing a Rigid Rod? - Comments

    From the Insights post: "The speed of sound in diamond is about 12000 m/s which is about 25 thousand times slower than the speed of light (299792458 m/s). But what about some hypothetical “unobtainium”? Why couldn’t unobtainium’s speed of sound be faster than the speed of light?" I suppose...
  6. M

    Conceptual origin of the magnetic vector potential....?

    Thanks, pretty much exactly what I was looking for...
  7. M

    Conceptual origin of the magnetic vector potential....?

    In Griffiths, it seems that the conceptual introduction of the magnetic vector potential to electrodynamics was justified based on the fact that the divergence of a curl is zero; so we can define a magnetic field as the curl of another vector A and still maintain consistency with Maxwell's...
  8. M

    Semi-classical argument for stimulated emission?

    Should have checked before I posted, I think this has been brought up in earlier threads... Not sure how to delete though; apologies for redundancy.
  9. M

    Semi-classical argument for stimulated emission?

    Laser action by definition requires the presence of stimulated emission in the laser medium. The typical way of treating this semi-classically is to introduce the Einstein coefficients, in essentially an ad hoc way, then derive the Einstein equations for the various level population transitions...
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