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Light always travels at the speed of light, although

that's a different number in different substances.

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Q: When is the only time that light travels at the speed of light?
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What is the only time that light waves travel at the speed of light?

Light always travels at the speed of light. The only time that's 299,792,458 meters per second ( " c " ) is when it's traveling in vacuum.


When is the only time that the light waves travel at the speed of light?

Light always travels at the speed of light. The only time that's 299,792,458 meters per second is when the light is in vacuum.


Does light slow down when it travels through matter?

Light slows down when it travels through matter.The only time light travels at is maximum speed, c, is in a vacuum.


What is the only time light waves travel at the speed of light?

A very prompting question! I am physics professor and my research deals with this topic, which spans the fields of minute distances (Planck lengths) and extra dimensions. Currently we believe light only travels the speed of light within the "inertia vacuum" of a Calabi Yau manifold. ================================ Light always travels at the speed of light. The only time that's 299,792,458 meters per second is when the light is in vacuum.


How has the idea of light years changed over time?

this can never change, light travels at a constant speed, a light year is the distance light travels in one year.


How fast does light travel in a micro second?

The speed of light is not dependent on how long time it travels.


When is the only time light wavesd travels at the speed of light miels per second?

Light waves always travel at the speed of light ... whatever it may be inside the material they're traveling through. They only travel at 300,000 kilometers (186,282 miles) per second in vacuum.


What is the speed it takes your light bulb to transmit at the speed of light?

By definition, light travels at the speed of light. About 300,000 kps


If time and distance approach zero relative to an observer as one approaches light speed and light travels at light speed wouldn't an observer see light going faster than it is?

time dilates, space contracts, speed of light holds constant.


Why is light measured in distance and not in time?

-- The distance that light travels in some amount of time is expressed in units of distance. -- The time that it takes light to cover some amount of distance is expressed in units of time. -- The speed of light is expressed in units of speed . . . distance/time


What travels faster the speed of light or the speed of sound?

The speed of light is nearly a million times faster than the speed of sound.The speed of light is roughly 882 thousand times the speed of sound.-- Sound takes about 4.7 seconds to cover 1 mile.-- Light takes about 0.0000054 second to cover 1 mile.-- In the time it takes sound to travel one mile, light travels 881,741 miles .


How far is 9000 light years?

900 billion years - if you travel near the speed of light. If you travel at any slower speed, it will take longer of course. But do some reading on time dilation - if the traveller travels at a speed very near the speed of light, from his point of view it will take much less time.900 billion years - if you travel near the speed of light. If you travel at any slower speed, it will take longer of course. But do some reading on time dilation - if the traveller travels at a speed very near the speed of light, from his point of view it will take much less time.900 billion years - if you travel near the speed of light. If you travel at any slower speed, it will take longer of course. But do some reading on time dilation - if the traveller travels at a speed very near the speed of light, from his point of view it will take much less time.900 billion years - if you travel near the speed of light. If you travel at any slower speed, it will take longer of course. But do some reading on time dilation - if the traveller travels at a speed very near the speed of light, from his point of view it will take much less time.