How long does light take to cross a distance?
The time light, or anything moving at a share of its speed, takes to cover a distance.
Time to cross
1.28 s
Light takes 1.28 s to cross 384,400,000 m.
- Time in seconds
- 1.282 s
Try an example
How it is worked out
t = distance_m / (speed_share * c)Where the numbers come from
Keep in mind
The time scales with one over the speed: at half the speed of light the crossing takes twice as long. A time over a day is shown in days and hours.
Link to this answer
Address
https://clipwright.studio/tools/light-travel-time?distance_m=384400000&speed_share=1Anyone who opens this address sees the same answer.
Make a film of it
Your coding agent can compute this, scene by scene.
More calculators
- How much air is there at a height?
- At what temperature does water boil up a mountain?
- At what height does the air pressure fall to a given share of sea level’s?
- How much land floods if the sea rises, or seafloor dries if it falls?
- How much energy does an earthquake release?
- How long is the day at any latitude and tilt?
- How much sunlight would Earth get closer to or farther from the Sun?