[HN Gopher] Sonoluminescence
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Sonoluminescence
Author : thunderbong
Score : 67 points
Date : 2021-06-27 08:25 UTC (2 days ago)
(HTM) web link (en.wikipedia.org)
(TXT) w3m dump (en.wikipedia.org)
| klysm wrote:
| Wow the section on pistol shrimp is incredible - I had no idea
| that animals could weaponize bubbles!
| pvaldes wrote:
| And they are everywhere below 40m deep (or so) in soft bottoms.
| Is an omnipresent danger for small fishes. Mantis shrimp are
| also evil things. Pistol shrimps aren't more known because they
| are (fortunately) small, but they are very interesting
| creatures.
| adolph wrote:
| _It has subsequently been discovered that another group of
| crustaceans, the mantis shrimp, contains species whose club-
| like forelimbs can strike so quickly and with such force as to
| induce sonoluminescent cavitation bubbles upon impact._
|
| More on the Mantis Shrimp (including super-color sight):
| https://theoatmeal.com/comics/mantis_shrimp
| wil421 wrote:
| > Pistol shrimp (also called snapping shrimp) produce a type of
| cavitation luminescence from a collapsing bubble caused by
| quickly snapping its claw... was whimsically dubbed
| "shrimpoluminescence" upon its discovery in 2001.
|
| I would love to see shrimpoluminescence first hand but it says
| you can't see it with the naked eye.
| crazydoggers wrote:
| You can see the bubbles... but I think the light is too dim
| to make out. Check out the YouTube link in the other reply.
| crazydoggers wrote:
| Yep! I've got one in my 100 gallon reef aquarium. He hides all
| the time, but his bubble shots are loud and a constant
| companion.
|
| Here's some slow motion video of the bubbles they form:
|
| https://youtu.be/QXK2G2AzMTU
| jareklupinski wrote:
| A great experiment that can be set up easily enough on a desk at
| home to ponder an unsolved mystery of our time :)
| nuclearwast wrote:
| I always wondered why this did not receive more attention in the
| physic field. I remember reading that it could be produce with
| just water ultrasonic device to cause cavitation of bubble to get
| this effect.
|
| It generates very fast flash of light,
|
| Abnormally high heat.
|
| Those are not easy thing thing to do with low power devices.
|
| I'm guessing it doesn't scale up, but I don't think billions were
| spend to try (looking at you tokamak)
| marcosdumay wrote:
| You mean specifically in the context of fusion power? Well,
| fusion is primary concerned with efficiency, and this isn't
| much efficient and has no avenue for improving.
|
| It can probably scale up on the sense that you get more light
| emitted, and more high-energy regions. That is just not enough.
|
| It probably will be very useful to replicate that heat-
| concentration effect on other contexts. But my guess is that
| the experiment has not gathered much attention yet because
| nobody invented those contexts. So there are only the purest of
| the theoretic interest.
| vimacs2 wrote:
| Maybe it cannot act as a direct catalyst for fusion but it
| could potentially act as a catalyst for another potential
| catalyst for fusion, such as a pellet of fissionable
| material.
| _Nat_ wrote:
| Why?
|
| I mean, we have all sorts of ways to generate heat and light
| already. So what special quality do you perceive
| sonoluminescence potentially having at a large scale?
| ArnoVW wrote:
| The Thought Emporium did a DYI experiment on this that was quite
| interetsing: https://www.youtube.com/watch?v=puVxGnl_3y8
| Cybotron5000 wrote:
| Wowser - really fascinating - never heard of this before...
| Thanks for posting!
| pvaldes wrote:
| https://www.youtube.com/watch?v=gMhjqbESIeY
| alisonkisk wrote:
| Video without fake gunshot sound effects:
|
| https://m.youtube.com/watch?v=ZJm0npZAk3o
| Cybotron5000 wrote:
| '...deploying shrimp decoy off the starboard bow...' X-)
| Cybotron5000 wrote:
| mental!
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