Difference between revisions of "Speed of Light"
(New page: ==Speed of Light / Lightspeed == Is the distance (299,792,458 metres) that light travels in a vacuum in one second. Light traveling through an object will travel slower than 1 light secon...) |
|||
| Line 10: | Line 10: | ||
kilometres per second 300,000 | kilometres per second 300,000 | ||
| + | |||
kilometres per hour 1,079 million | kilometres per hour 1,079 million | ||
| + | |||
miles per second 186,000 | miles per second 186,000 | ||
| + | |||
miles per hour 671 million | miles per hour 671 million | ||
| + | |||
astronomical units per day 173 | astronomical units per day 173 | ||
| − | Approximate light signal travel times | + | |
| − | Distance Time | + | ===Approximate light signal travel times=== |
| + | |||
| + | ===Distance Time=== | ||
| + | |||
one foot 1.0 ns | one foot 1.0 ns | ||
| + | |||
one metre 3.3 ns | one metre 3.3 ns | ||
| + | |||
one kilometre 3.3 μs | one kilometre 3.3 μs | ||
| + | |||
one statute mile 5.4 μs | one statute mile 5.4 μs | ||
| + | |||
from geostationary orbit to Earth 119 ms | from geostationary orbit to Earth 119 ms | ||
| + | |||
the length of Earth's equator 134 ms | the length of Earth's equator 134 ms | ||
| + | |||
from Moon to Earth 1.3 s | from Moon to Earth 1.3 s | ||
| + | |||
from Sun to Earth (1 AU) 8.3 min | from Sun to Earth (1 AU) 8.3 min | ||
| + | |||
one parsec 3.26 years | one parsec 3.26 years | ||
| + | |||
from Proxima Centauri to Earth 4.24 years | from Proxima Centauri to Earth 4.24 years | ||
| + | |||
from Alpha Centauri to Earth 4.37 years | from Alpha Centauri to Earth 4.37 years | ||
| + | |||
from the nearest galaxy (the Canis Major Dwarf Galaxy) to Earth 25,000 years | from the nearest galaxy (the Canis Major Dwarf Galaxy) to Earth 25,000 years | ||
| + | |||
across the Milky Way 100,000 years | across the Milky Way 100,000 years | ||
| + | |||
from the Andromeda Galaxy to Earth 2.5 million years | from the Andromeda Galaxy to Earth 2.5 million years | ||
| + | |||
from the furthest observed galaxy to Earth 13 billion years | from the furthest observed galaxy to Earth 13 billion years | ||
Latest revision as of 21:02, 10 April 2011
Contents
Speed of Light / Lightspeed
Is the distance (299,792,458 metres) that light travels in a vacuum in one second. Light traveling through an object will travel slower than 1 light second.
Exact values and Comparisons (from Wikipedia)
Metres per second 299,792,458 Planck units 1
Approximate values
kilometres per second 300,000
kilometres per hour 1,079 million
miles per second 186,000
miles per hour 671 million
astronomical units per day 173
Approximate light signal travel times
Distance Time
one foot 1.0 ns
one metre 3.3 ns
one kilometre 3.3 μs
one statute mile 5.4 μs
from geostationary orbit to Earth 119 ms
the length of Earth's equator 134 ms
from Moon to Earth 1.3 s
from Sun to Earth (1 AU) 8.3 min
one parsec 3.26 years
from Proxima Centauri to Earth 4.24 years
from Alpha Centauri to Earth 4.37 years
from the nearest galaxy (the Canis Major Dwarf Galaxy) to Earth 25,000 years
across the Milky Way 100,000 years
from the Andromeda Galaxy to Earth 2.5 million years
from the furthest observed galaxy to Earth 13 billion years
