Light-minute, light-hour, etc.

thalion · Feb 7, 2005

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

newtonian · Feb 7, 2005

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

igorsboss · Feb 7, 2005

Here is an interesting one... Light-nanosecond = 0.3 meters

newtonian · Feb 7, 2005

igorsboss- Interesting. This quote is comparable: "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. OK, that means a nanosecond is a billionth of a second. And 100 feet is about 30 meters, Anyone have a more exact conversion table?

glutomoto · Feb 8, 2005

Re: Anyone have a more exact conversion table? 100 feet = 30.5 meters, are u sure u need a conversion calculator ? Length Conversion Calculator Cleave Books - Specialist calculators Cleave Books <img src="/images/icons/smile.gif" /> <div class="Discussion_UserSignature"> </div>

igorsboss · Feb 8, 2005

Anyone have a more exact conversion table? Since c=299792458 m/s exactly, and 1.0 ns = 1.0 E-9 s exactly, light travels at exactly 0.299792458 m/ns. 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.

thalion · Feb 8, 2005

1 km = .621 mi 1 mi = 1.609 km

Leovinus · Feb 8, 2005

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

5stone10 · Feb 8, 2005

light-minute = 1.799*10^7 km (.12 AUs) Yes - I think I've got it !!!! 8.3333333 light minutes for the Sun's light to hit Earth !!!!!!!

siarad · Feb 8, 2005

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

5stone10 · Feb 8, 2005

Thanks - but no thanks !

Saiph · Feb 9, 2005

or not at all. <div class="Discussion_UserSignature"> --------------------SaiphMOD@gmail.com -------------------"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" -- The Tenth Doctor, "Blink" </div>

igorsboss · Feb 9, 2005

And of course, you hear them long after you see them speak. Unless you're having a light conversation.

newtonian · Feb 9, 2005

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

siarad · Feb 10, 2005

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

Saiph · Feb 21, 2005

that colored wire trick is a neat little tidbit. <div class="Discussion_UserSignature"> --------------------SaiphMOD@gmail.com -------------------"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" -- The Tenth Doctor, "Blink" </div>

rodrunner79 · Sep 19, 2005

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

cpuguy1 · Sep 21, 2005

186282.39705 mi s-1 299792458 m s-1 1 E 0 186282 mi 698 yd 2 ft 5.087999973446131 in 1 sec 1 Hz 1 E-1 18628 mi 421 yd 2 ft 7.708799997344613 in 1 E-2 1862 mi 1450 yd 6.77088000549702 in 1 E-3 186 mi 497 yd .6770880009098619 in = 1 msec 1 000 Hz 1 E-4 18 mi 1105 yd 2 ft 1.267708800140099 in 1 E-5 1 mi 1518 yd 1 ft 8.526770880015647 in 1 E-6 327 yd 2 ft 6.852677088000746 in = 1 usec 1 000 000 Hz 1 E-7 32 yd 2 ft 4.285267708799921 in 1 E-8 3 yd 10.02852677088001 inches 1 E-9 11.802852677088 inches = 1 nsec 1 000 000 000 Hz 1 E-10 1.1802852677088 in 1 E-11 .11802852677088 in 1 E-12 .011802852677088 in = 1 psec 1 000 000 000 000 Hz 1 E-13 .0011802852677088 in 1 E-14 1.1802852677088D-04 in 1 E-15 1.1802852677088D-05 in 1.0 = 299792458 meters 0.1 = 29979245.8 m 0.01 = 2997924.58 m E-3 0.001 = 299792.458 m 0.000 1 = 29979.2458 m 0.000 01 = 2997.92458 m E-6 0.000 001 = 299.79246 m 0.000 000 1 = 29.97925 m 0.000 000 01 = 2.99792 m E-9 0.000 000 001 = 299.79 millimeter 0.000 000 000 1 = 29.98 mm 0.000 000 000 01 = 2.99 mm E-12 0.000 000 000 001 = .29 mm 0.000 000 000 000 1 = .03 mm 0.000 000 000 000 01 E-15 0.000 000 000 000 001 <div class="Discussion_UserSignature"> 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. - Professor West </div>

cpuguy1 · Sep 21, 2005

From above ... One Light Year equals ... 9460730472581000 meters (m) 5878625373184 miles (mi) What value for 'c' did you use? <div class="Discussion_UserSignature"> 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. - Professor West </div>

treva00023 · Sep 22, 2005

Whats smaller than a nanometer?

vogon13 · Sep 22, 2005

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

Saiph · Sep 22, 2005

nanometer is 10^-9 meters. Angstrom is 10^-10 meters. So, 10x smaller than nanometer. pico-meter is 10^-12 meters. So, 1000x smaller than nanometer. Femtometer is 10^-15 meters. So 1000x smaller than a picometer. Attometer is 10^-18 meters. So 1000x smaller than an Femtometer. 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"> --------------------SaiphMOD@gmail.com -------------------"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" -- The Tenth Doctor, "Blink" </div>

Saiph · Sep 23, 2005

Astronomers, indeed most scientists, tend to use metric. 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. Anyway, what "date" don't you run accross? <div class="Discussion_UserSignature"> --------------------SaiphMOD@gmail.com -------------------"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" -- The Tenth Doctor, "Blink" </div>

cpuguy1 · Sep 27, 2005

http://jimvb.home.mindspring.com/unitsystem.htm Factor Name Symbol 10-1 deci d 10-2 centi c 10-3 milli m 10-6 micro µ 10-9 nano n 10-12 pico p 10-15 femto f 10-18 atto a 10-21 zepto z 10-24 yocto y 10-27 xonto x 10-30 wekto w 10-33 vunkto v 10-36 unto u 10-39 trekto td - not sure how they got this one 10-42 sotro s 10-45 rimto r 10-48 quekto q 10-51 pekro pk 10-54 otro o 10-57 nekto nk 10-60 mikto mi 10-63 lunto l <div class="Discussion_UserSignature"> 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. - Professor West </div>

Light-minute, light-hour, etc.

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