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Measure The Speed Of Light With Your Microwave

maddmike writes "There is a very interesting article on About.com that shows how to measure the speed of light using your microwave to melt chocolate. "

31 of 296 comments (clear)

  1. Measuring the speed of light is easy by kfg · · Score: 3, Funny

    Just try to measure the speed of dar. . .

    Oh, nevermind.

    KFG

  2. Kids... by JessLeah · · Score: 5, Funny

    ...don't try this at home. Theobroma cacao (chocolate) is a highly dangerous substance with known stimulant effects. It is also highly addictive and should be used with extreme caution. Overdose can cause morbid obesity, sluggishness, and death. Only qualified experts should handle this dangerous reagent at home.

    I am experienced at handling this most hazardous material. Please wrap it carefully in a heatproof container, and mail it to me. It will be disposed of properly. (burp)

    1. Re:Kids... by kfg · · Score: 3, Funny

      Gee. Thanks. Now I'm having a Cadbury Fruit & Nut fit.

      I have an Easter Bunny on my back.

      KFG

    2. Re:Kids... by kfg · · Score: 3, Funny

      No, that's Bun-Bun.

      Zoe preserve me from the "gaping headwound of love."

      KFG

    3. Re:Kids... by Citizen+of+Earth · · Score: 4, Funny

      It is also highly addictive and should be used with extreme caution. Overdose can cause morbid obesity, sluggishness, and death.

      Yeah, well the guy put some dihydrogen monoxide (DHMO) into his microwave as well, so we know that he has no concern for his own safety or those around him!

  3. Apparently by FannyMinstrel · · Score: 2, Funny

    According to the website, using the formula, the speed of light is 24 cubits per moonphase.

  4. Powered by Peeps by Sir+Pallas · · Score: 2, Funny

    Maybe we can unravel the mystery of the expansion of the early universe with a microwave and a set of unevenly expanding peeps. I envision a new era in science

  5. Hey how come mines slower ? by Anonymous Coward · · Score: 2, Funny

    Is it just my microwave, or is the speed of light 2m/s ?

  6. Got that beat by divide+overflow · · Score: 4, Funny

    There is a very interesting article on About.com that shows how to measure the speed of light using your microwave to melt chocholate.

    Big deal...I can measure Hubble's Constant by charring bagels in my toaster. Pffft.

  7. I DID IT! by Anonymous Coward · · Score: 2, Funny

    Yay! I did that experiment! According to my calculations light in air travels at 783 km/h. Wow, that's fast!

  8. Measure The Speed Of... by Anonymous Coward · · Score: 5, Funny

    ...Your Local Fire Department by placing some metal in your microwave and putting a blanket over it. =P

  9. This is boring by Anonymous Coward · · Score: 3, Funny

    Anyone can melt chocolate or heat water in their microwave.

    Real geeks use microwaves for what they were intended for... nuking free trial CDs from AOL.

  10. the multiversity of chocolate by tommten · · Score: 2, Funny

    Bah.. I'm waiting for chocolate wafer-transistors.
    think.. eatable cpu's! or better.. eatable storage for the paranoid

    --
    - I choked on the red pill and now I'm stuck in limbo
  11. Ah, I see the correlation... by raam · · Score: 2, Funny

    Chocolate is dark, like the universe.

    Chocolate is semi-soft, like the universe.

    Chocolate is an emulsion, like the universe.

    Chocolate is good...and evil, like the universe.

    Chocolate may be going into or coming out of a black hole, like the universe (I had to).

    So, inevitably, this bean is, indeed, a universe unto itself.

  12. Re:neat idea... bad result by panurge · · Score: 4, Funny
    No, you thought wrong.
    Speed of light approx 300 000 km/s = 3E8 m/s.

    Actually, the easiest way to measure the speed of light is to measure the interval between the lights turning green and the first cab horn sounding during the morning rush hour in Manhattan, then measure the distance from the lights to the cab.

    Neither original nor practical, but then I am tired and this is /.

    --
    Panurge has posted for the last time. Thanks for the positive moderations.
  13. Melting "chocholate" and measuring c? by WIAKywbfatw · · Score: 4, Funny

    maddmike writes "There is a very interesting article on About.com that shows how to measure the speed of light using your microwave to melt chocholate. "

    Bah, that's easy stuff. It's about time that About.com tackled the real holy grail of science - how to teach Slashdot editors to use a spelling checker.

    --

    "Accept that some days you are the pigeon, and some days you are the statue." - David Brent, Wernham Hogg
  14. Re:turntable by shepd · · Score: 3, Funny

    >could someone please provide me with the equation if mine has a turntable?

    Step [1]: Using a highly detailed tool (1) you will first wrap around a plastic groove on the front of the microwave. You will then use this tool (1) putting a few newtons of pulling force translaterally against the groove. Too much pressure here may be dangerous, so use caution. If your microwave has no such groove, you'll press tool (1) against a reverse indentation on the front of the microwave using at least a few newtons of pressure. Overuse of pressure is not a danger when using the correct tool (1).

    Step [2]: At this point you'll be able to access the inside of the microwave. If you cannot access the inside of the microwave at this point, you have not successfully completed step [1]. Please attempt it again as necessary to access the inside of the microwave. Once access has been gained, you will use tool (1) to grip the edges of the glass object inside. Do not grip the glass object extremely tightly or it may be damaged! Now, using tool (1) exert an upward pressure to the glass object, causing it to levitate to the middle of the microwave (this point will vary depending on model).

    Step [3]: You must complete step [2] to continue to this step. If you are at this step, you are now gripping a glass object centered in your microwave. Pull this object towards you with tool (1). Continue to move this object and rest it on a flat, cool, surface. Ungrip the object. Using a choice of tool (2), exert a reverse pressure on the item disloged in step [1]. Continue to extert this pressure until a click is heard.

    Step [4]: There is no step [4]. If you have completed step [3], your microwave is now ready for the experiment in the article.

    Required Tools:
    (1) fingers
    (2) hand

    Optional Tools:
    (3) brain
    (4) article

    --
    If you could be told what you can see or read, then it follows that you could be told what to say or think - BoC
  15. Spoiler by kinnell · · Score: 5, Funny

    It's 3x10^8 m/s

    --
    If I seem short sighted, it is because I stand on the shoulders of midgets
    1. Re:Spoiler by fruey · · Score: 2, Funny
      Even Google Calculator knows the speed of light

      the speed of light = 299 792 458 m/s

      You are wrong by 207 542 m/s which is quite a large margin for keeping the Slashdot correction nazis at bay.

      --
      Conversion Rate Optimisation French / English consultant
    2. Re:Spoiler by Captain+Nitpick · · Score: 5, Funny
      You are wrong by 207 542 m/s which is quite a large margin for keeping the Slashdot correction nazis at bay.

      On behalf of the Guild of Pedants and Correctors, I hereby state that a 0.0692% error is well within the acceptable error for most Slashdot posts.

      Quite frankly, we're usually happy if you people get within an order of magnitude of the correct value.

      (P.S. We really don't appreciate being called nazis. We may be fanatics, but we're not fascists.)
      --
      But then again, I could be wrong.
  16. I get more enjoyment... by Anonymous Coward · · Score: 3, Funny


    ...out of trying to explain to the physics-challenged that microwaves are actually bigger than the little holes in the door screen.

    Some brave souls try to correct me by pointing out that "the microwave particles" are so small they can't be seen, so are clearly smaller than the holes.

    I then introduce the notion of particle/wave and laugh as I watch them go completely blank...

  17. Re:Measure the frequency of your microwave instead by Anonymous Coward · · Score: 1, Funny
    actually, we know the speed of light exactly, because the meter was redefined to make c==2,99792458*10^8m/s

    I'm an American. Could you translate that into cubits per minute, or Senators per hour?

  18. Re:Half the experiment is missing by panurge · · Score: 2, Funny
    Nothing, it's bad for your health. If you don't understand this, you are not a physicist.

    In the 80s my resume used to read:

    • DC to 10GHz
    • microvolts to kilovolts
    • femtoamps to kiloamps
    --
    Panurge has posted for the last time. Thanks for the positive moderations.
  19. Blast my taste buds! by MoeMoe · · Score: 3, Funny

    I was about to attempt this fascinating experiment but my stomach had... other plans

    Couldn't they have created this experiment with something less tasty, like broccoli?!

    --
    Business \Busi"ness\, n.;
    A scam in which all people involved perceive as beneficial...
  20. Using Ping to measure speed of light by AYeomans · · Score: 4, Funny

    You can always use your network cables instead; brief description or full paper.

    Anyone care to use the method with RFC1149 Avian Carrier Protocol, namely Using Ping to determine Speed of Flight!

    --
    Andrew Yeomans
  21. Don't worry... by dalangalma · · Score: 2, Funny

    this is Slashdot we're talking about. I don't think a crowd of women is something regular denizens have to worry about very often.

  22. MST3K by NanoGator · · Score: 4, Funny

    There was this episode of Mystery Science Theater 3000 (Secret Agent Super Dragon?) where the main character flips a light switch, and about half a second later the light dimmed down. Crow said "Light travels slower in his world". Heh.

    Hmmm.. sorry guys, it really is more of a visual joke.

    --
    "Derp de derp."
  23. I use a torch and a stopwatch by Anonymous Coward · · Score: 1, Funny

    Yeah it's pretty quick

  24. Ants by BuilderBob · · Score: 5, Funny

    You can also measure the speed of light using ants, the ants are small enough that they can fit into the low energy points of the microwave.

    If you put some ants in the microwave, and switch it on, they all start moving from the heat into the cold spots, measure the distance between the cold spots and you have the wavelength.

    Obviously, you shouldn't *actually* try this, unless the ants happen to climb in there looking for food, then they're fair game :) And take the turntable out, that's cruel.

    The calculation (chocolate or ants) does still rely on prior knowledge of the frequency of the microwave(s) being used. Trying to measure the speed of light without a prior fixed frequency or wavelength is much more taxing. A shortwave radio can help though, or a flashlight and a large telescope (bouncing signals off the moon)

  25. Re:Half the experiment is missing by Mesaeus · · Score: 2, Funny

    Circular Reasoning circular reasoning, see "Circular Reasoning"

  26. That's nothing, try using grapes by skintigh2 · · Score: 2, Funny

    I read about a trick on the web a few years ago so I tried it at home and showed my family. I cut a grape in half length-wize, but left a little skin connecting the halve, lay the two round sides on a plate, placed it in the microwave, hit start, and **ZAP!!!** -- flames, sparks, toasted grape halves flying apart.

    My brother thought it was "awesome," my mom feared for her microwave, and my dad (an EE) said "ah, the grapes are about the size of the wavelength of a microwave so the grape must be acting as a dipole antenna, neat" and walked away.