Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

What would happen if a big superfluid cloud eclipses the Sun?

  1. Nov 29, 2012 #1
    Imagine a big superfluid cloud the size of the Moon, at the same distance of the Moon in front of the Sun. A total eclipse of 7 minutes.
    What would happen with the light coming from the sun during these 7 minutes?
    Would we see a "night sun"?

    Another question.
    "Estimates of the photon travel time range between 10,000 and 170,000 years"
    Could the center of the sun be in a superfluid state? Cold???
     
  2. jcsd
  3. Nov 29, 2012 #2

    davenn

    User Avatar
    Science Advisor
    Gold Member

    and what scientific evidence to you base the existance of some superfluid ?

    Please try and keep within known scientific understanding,

    from where to where ?

    it does take light 150,000 - 170,000 to get to us from with the Large or Small Magellanic Clouds ... ie. they are ~ 160,000 light years from us

    Dave
     
  4. Nov 29, 2012 #3

    phinds

    User Avatar
    Gold Member
    2016 Award

    I think he's talking about the time for a photon to propagate from the center of the sun to the outside, which I believe is normally taken as about 100,000 years.
     
  5. Nov 29, 2012 #4
    Superfluid is a state of matter. I just said "imagine" because I´m curious about the effect that we will perceive.


    From the center of the sun to the outside.
     
  6. Nov 29, 2012 #5

    phinds

    User Avatar
    Gold Member
    2016 Award

    That's a lot like asking "If unicorns existed, would their horns be long or short?" Not really the kind of thing this forum is big on. We're more into discussion of established science.
     
  7. Nov 29, 2012 #6

    K^2

    User Avatar
    Science Advisor

    Superfluids don't affect light in any special ways that I know of.

    Considering how many times that energy is absorbed, re-emitted, absorbed again, transferred in collisions, carried by convection, and so on, do you really think it's fair to say that it's time it takes a photon to propagate?
     
  8. Nov 30, 2012 #7

    phinds

    User Avatar
    Gold Member
    2016 Award

    I am just repeating what I have read about this. Propogate may be a poor choice of words for the process, but I don't know a better one. I certainly do not mean that I think a single specific photon move from inside to outside, taking 100,000 years.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: What would happen if a big superfluid cloud eclipses the Sun?
  1. What would happen if (Replies: 12)

  2. What would happen if (Replies: 19)

Loading...