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'''Light-time''' is the product of the [[speed of light]] in a vacuum and time it takes light to travel a certain distance in space. It is most commonly used in light-years to calculate interstellar distances.<ref>[https://www.merriam-webster.com/dictionary/light-time “Light-Time.”] n.d. In ''Marriam-Webster Dictionary''.</ref>
'''Light-time''' is the product of the [[speed of light]] in a vacuum and time it takes light to travel a certain distance in space. It is most commonly used in light-years to calculate interstellar distances.<ref>[https://www.merriam-webster.com/dictionary/light-time “Light-Time.”] n.d. In ''Marriam-Webster Dictionary''.</ref>


== Common units of light time ==
==Common units of light-time==
The light-second, light-minute, and light-year are the most common light-time units used.
The light-second, light-minute, and light-year are the most common light-time units used.
{| class="wikitable"
{| class="wikitable"
|+Common units of light time
|+Common units of light-time
!Unit
!Unit
!Meters
!Meters
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== References ==
==References==
<references />
<references />

Revision as of 07:23, 7 December 2019

Light-time is the product of the speed of light in a vacuum and time it takes light to travel a certain distance in space. It is most commonly used in light-years to calculate interstellar distances.[1]

Common units of light-time

The light-second, light-minute, and light-year are the most common light-time units used.

Common units of light-time
Unit Meters Miles Astronomical Units
1 Light-second 2.9979×108m 1.8628×105mi 0.0020 AU
1 Light-minute 1.7987×1010m 1.1177×107mi 0.12 AU
1 Light-year 1.7987×1015m 5.8786×1012mi 63000 AU

References

  1. “Light-Time.” n.d. In Marriam-Webster Dictionary.