Light-minute, light-hour, etc.

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thalion

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I thought this stuff might be interesting in a purely academic sense, even if we never really use these units.<br /><br />light-minute = 1.799*10^7 km (.12 AUs)<br />light-hour = 1.079*10^9 km (7.2 AUs)<br />light-day = 2.59*10^10 km (173.1 AUs)<br />light-week = 1.813*10^11 km (1211.7 AUs)<br />(7 d)<br />light-month = 7.88*10^11 km (5269.2 AUs)<br />(30.44 d)
 
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newtonian

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Thallion - Thank you. Can you post the conversion to miles from kilometers?
 
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igorsboss

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Here is an interesting one...<br /><br />Light-nanosecond = 0.3 meters
 
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newtonian

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igorsboss- Interesting. This quote is comparable:<br /><br />"The brain accesses information by electrochemical impulses. "Even though such impulses are notoriously slow-about 100 feet per second [30 m/sec]-they still outperform electrical impulses over metallic conduits, which can travel about one foot [0.3 m] per nanosecond or a billion feet [300 million m] per second." - "Awake!," 5/22/90, p, 31. <br /><br />OK, that means a nanosecond is a billionth of a second.<br /><br />And 100 feet is about 30 meters,<br /><br />Anyone have a more exact conversion table?
 
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igorsboss

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<font color="yellow">Anyone have a more exact conversion table?</font><br /><br />Since c=299792458 m/s exactly, and 1.0 ns = 1.0 E-9 s exactly, light travels at exactly 0.299792458 m/ns.<br /><br />Suppose you are having a conversation with someone standing about 6 feet away from you. You are actually seeing them as they used to be, 6 nanoseconds ago.
 
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Leovinus

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And of course, you hear them long after you see them speak. <div class="Discussion_UserSignature"> </div>
 
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5stone10

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<font color="yellow">light-minute = 1.799*10^7 km (.12 AUs)</font><br /><br /><br />Yes - I think I've got it !!!!<br /><br />8.3333333 light minutes for the Sun's light to hit Earth !!!!!!!
 
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siarad

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There's not just a time displacement but an angular one too. Measure the angle & you can calculate the time & distance.
 
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Saiph

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or not at all. <div class="Discussion_UserSignature"> <p align="center"><font color="#c0c0c0"><br /></font></p><p align="center"><font color="#999999"><em><font size="1">--------</font></em></font><font color="#999999"><em><font size="1">--------</font></em></font><font color="#999999"><em><font size="1">----</font></em></font><font color="#666699">SaiphMOD@gmail.com </font><font color="#999999"><em><font size="1">-------------------</font></em></font></p><p><font color="#999999"><em><font size="1">"This is my Timey Wimey Detector.  Goes "bing" when there's stuff.  It also fries eggs at 30 paces, wether you want it to or not actually.  I've learned to stay away from hens: It's not pretty when they blow" -- </font></em></font><font size="1" color="#999999">The Tenth Doctor, "Blink"</font></p> </div>
 
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igorsboss

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<font color="yellow">And of course, you hear them long after you see them speak.</font><br /><br />Unless you're having a light conversation.
 
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newtonian

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igorsboss - Thank you.<br /><br />Sounds good. But sound travels much slower than light - so lip-=reading is at light speed, but sound is slower.<br /><br />So, if you lip-read from a long enough distance, you could respond before hearing the question!<br /><br />Light subject, sound posts!
 
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siarad

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<blockquote><font class="small">In reply to:</font><hr /><p>So, if you lip-read from a long enough distance, you could respond before hearing the question! <br /><br />Light subject, sound posts! <br /><p><hr /></p></p></blockquote><br /><img src="/images/icons/laugh.gif" /> <img src="/images/icons/smile.gif" /> <img src="/images/icons/wink.gif" />
 
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Saiph

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that colored wire trick is a neat little tidbit. <div class="Discussion_UserSignature"> <p align="center"><font color="#c0c0c0"><br /></font></p><p align="center"><font color="#999999"><em><font size="1">--------</font></em></font><font color="#999999"><em><font size="1">--------</font></em></font><font color="#999999"><em><font size="1">----</font></em></font><font color="#666699">SaiphMOD@gmail.com </font><font color="#999999"><em><font size="1">-------------------</font></em></font></p><p><font color="#999999"><em><font size="1">"This is my Timey Wimey Detector.  Goes "bing" when there's stuff.  It also fries eggs at 30 paces, wether you want it to or not actually.  I've learned to stay away from hens: It's not pretty when they blow" -- </font></em></font><font size="1" color="#999999">The Tenth Doctor, "Blink"</font></p> </div>
 
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rodrunner79

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Here's some more conversions:<br /><br />1 Light Year is equal (=) to:<br /><br />9.460730472581E+25 angstrom<br />63241.07708807 astronomical units (au)<br />946073047258100000 centimeters (cm)<br />470290029854700 chain<br />94607304725810000 decimeter (dm)<br />5173190328402000 fathom<br />31039141970410000 foot (ft)<br />47029002985470 furlong<br />372469703644900000 inch (in)<br />9460730472581 kilometer (km)<br />1959541791061 (league)<br />9460730472581000 meters (m)<br />5878625373184 miles (mi)<br />9460730472581000000 millimeters (mm)<br />9.460730472581E+21 micron (µ)<br />9.460730472581E+24 nanometer (nm)<br />5108385784331 nautical mile<br />0.306601393804 parsec<br />1881160119419000 rod<br />10346380656800000 yards (yd)<br /><br />Or<br /><br /> 94,607,304,725,810,000,000,000,000 angstrom<br /> 63,241.07708807 astronomical units<br /> 946,073,047,258,100,000 centimeters (cm)<br /> 470,290,029,854,700 chain <br /> 94,607,304,725,810,000 decimeter (dm)<br /> 5,173,190,328,402,000 fathom <br /> 31,039,141,970,410,000 foot (ft)<br /> 47,029,002,985,470 furlong <br /> 372,469,703,644,900,000 inch (in)<br /> 9,460,730,472,581 kilometer (km)<br /> 1,959,541,791,061 league <br /> 9,460,730,472,581,000 meters (m)<br /> 5,878,625,373,184 miles (mi)<br /> 9,460,730,472,581,000,000 millimeters (mm)<br /> 9,460,730,472,581,000,000,000 micron (µ)<br /> 9,460,730,472,581,000,000,000,000 nanometer (nm)<br /> 5,108,385,784,331 nautical mile<br /> 0.306601393804 parsec <br /> 1,881,160,119,419,000 rod <br /> 10,346,380,656,800,000 yards (yd)<br />
 
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cpuguy1

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<br /> 186282.39705 mi s-1<br /> 299792458 m s-1<br /><br /> 1 E 0 186282 mi 698 yd 2 ft 5.087999973446131 in 1 sec 1 Hz<br /> 1 E-1 18628 mi 421 yd 2 ft 7.708799997344613 in<br /> 1 E-2 1862 mi 1450 yd 6.77088000549702 in<br /> 1 E-3 186 mi 497 yd .6770880009098619 in = 1 msec 1 000 Hz<br /> 1 E-4 18 mi 1105 yd 2 ft 1.267708800140099 in<br /> 1 E-5 1 mi 1518 yd 1 ft 8.526770880015647 in<br /> 1 E-6 327 yd 2 ft 6.852677088000746 in = 1 usec 1 000 000 Hz<br /> 1 E-7 32 yd 2 ft 4.285267708799921 in<br /> 1 E-8 3 yd 10.02852677088001 inches<br /> 1 E-9 11.802852677088 inches = 1 nsec 1 000 000 000 Hz<br /> 1 E-10 1.1802852677088 in<br /> 1 E-11 .11802852677088 in<br /> 1 E-12 .011802852677088 in = 1 psec 1 000 000 000 000 Hz<br /> 1 E-13 .0011802852677088 in<br /> 1 E-14 1.1802852677088D-04 in<br /> 1 E-15 1.1802852677088D-05 in<br /><br /> 1.0 = 299792458 meters<br /> 0.1 = 29979245.8 m<br /> 0.01 = 2997924.58 m<br />E-3 0.001 = 299792.458 m<br /> 0.000 1 = 29979.2458 m<br /> 0.000 01 = 2997.92458 m<br />E-6 0.000 001 = 299.79246 m<br /> 0.000 000 1 = 29.97925 m<br /> 0.000 000 01 = 2.99792 m<br />E-9 0.000 000 001 = 299.79 millimeter<br /> 0.000 000 000 1 = 29.98 mm<br /> 0.000 000 000 01 = 2.99 mm<br />E-12 0.000 000 000 001 = .29 mm<br /> 0.000 000 000 000 1 = .03 mm<br /> 0.000 000 000 000 01 <br />E-15 0.000 000 000 000 001<br /> <div class="Discussion_UserSignature"> <p><font size="2">The polarization of the alpha wave's primary phase of the modified parallel cross section of your brain will confirm you are not thinking up to your potential.  -  </font><font size="2">Professor West</font></p> </div>
 
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cpuguy1

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From above ...<br />One Light Year equals ...<br />9460730472581000 meters (m) <br />5878625373184 miles (mi) <br /><br />What value for 'c' did you use?<br /> <div class="Discussion_UserSignature"> <p><font size="2">The polarization of the alpha wave's primary phase of the modified parallel cross section of your brain will confirm you are not thinking up to your potential.  -  </font><font size="2">Professor West</font></p> </div>
 
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vogon13

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Conservative compassion?<br /><br />{sorry, I try to be serious here most of the time}<br /><br /><br /><img src="/images/icons/laugh.gif" /><br /><br /> <div class="Discussion_UserSignature"> <p><font color="#ff0000"><strong>TPTB went to Dallas and all I got was Plucked !!</strong></font></p><p><font color="#339966"><strong>So many people, so few recipes !!</strong></font></p><p><font color="#0000ff"><strong>Let's clean up this stinkhole !!</strong></font> </p> </div>
 
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Saiph

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nanometer is 10^-9 meters.<br /><br />Angstrom is 10^-10 meters. So, 10x smaller than nanometer.<br /><br />pico-meter is 10^-12 meters. So, 1000x smaller than nanometer.<br /><br />Femtometer is 10^-15 meters. So 1000x smaller than a picometer.<br /><br />Attometer is 10^-18 meters. So 1000x smaller than an Femtometer.<br /><br />Smallest unit of distance (or of meaningful distance): Planck Length, or 10^-37 meters (If I recall correctly). Smaller than this, and quantum mechanics says it's so uncertain, that it can't be determined in any meaningful fashion. I.e. nothing of consequence, by definition, can be smaller than this. Google it if you want more info. <div class="Discussion_UserSignature"> <p align="center"><font color="#c0c0c0"><br /></font></p><p align="center"><font color="#999999"><em><font size="1">--------</font></em></font><font color="#999999"><em><font size="1">--------</font></em></font><font color="#999999"><em><font size="1">----</font></em></font><font color="#666699">SaiphMOD@gmail.com </font><font color="#999999"><em><font size="1">-------------------</font></em></font></p><p><font color="#999999"><em><font size="1">"This is my Timey Wimey Detector.  Goes "bing" when there's stuff.  It also fries eggs at 30 paces, wether you want it to or not actually.  I've learned to stay away from hens: It's not pretty when they blow" -- </font></em></font><font size="1" color="#999999">The Tenth Doctor, "Blink"</font></p> </div>
 
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Saiph

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Astronomers, indeed most scientists, tend to use metric.<br /><br />Then again, there are still strange unit conventions. I really don't know why, but occassionally I have to state stellar properties in Centimeters and Grams. Go figure.<br /><br />Anyway, what "date" don't you run accross? <div class="Discussion_UserSignature"> <p align="center"><font color="#c0c0c0"><br /></font></p><p align="center"><font color="#999999"><em><font size="1">--------</font></em></font><font color="#999999"><em><font size="1">--------</font></em></font><font color="#999999"><em><font size="1">----</font></em></font><font color="#666699">SaiphMOD@gmail.com </font><font color="#999999"><em><font size="1">-------------------</font></em></font></p><p><font color="#999999"><em><font size="1">"This is my Timey Wimey Detector.  Goes "bing" when there's stuff.  It also fries eggs at 30 paces, wether you want it to or not actually.  I've learned to stay away from hens: It's not pretty when they blow" -- </font></em></font><font size="1" color="#999999">The Tenth Doctor, "Blink"</font></p> </div>
 
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cpuguy1

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<br />http://jimvb.home.mindspring.com/unitsystem.htm<br /><br />Factor Name Symbol<br />10-1 deci d<br />10-2 centi c<br />10-3 milli m<br /><br />10-6 micro µ<br />10-9 nano n<br />10-12 pico p<br />10-15 femto f<br />10-18 atto a<br />10-21 zepto z<br />10-24 yocto y<br />10-27 xonto x<br />10-30 wekto w<br />10-33 vunkto v<br />10-36 unto u<br />10-39 trekto td - not sure how they got this one<br />10-42 sotro s<br />10-45 rimto r<br />10-48 quekto q<br />10-51 pekro pk<br />10-54 otro o<br />10-57 nekto nk<br />10-60 mikto mi<br />10-63 lunto l<br /> <div class="Discussion_UserSignature"> <p><font size="2">The polarization of the alpha wave's primary phase of the modified parallel cross section of your brain will confirm you are not thinking up to your potential.  -  </font><font size="2">Professor West</font></p> </div>
 
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