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1. physics.stackexchange.com › questions › 109982How is a vacuum able to propagate light? - Physics Stack Exchange

   physics.stackexchange.com › questions › 109982

   May 2, 2014 · Light may seem to be an exception, leading many to say that light is a wave that can travel through a vacuum with no medium. Light doesn't use EM fields as its medium; light IS an EM (electromagnetic) wave.

2. physics.stackexchange.com › questions › 55109What is light, and how can it travel in a vacuum forever in ...

   physics.stackexchange.com › questions › 55109

   How can light (or electromagnetic radiation) travel through a vacuum when there is nothing there to act as a medium, and do so forever in all directions? For example the light coming from a star millions of light years away.

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4. physics.stackexchange.com › questions › 18738What causes light to move through a vacuum

   physics.stackexchange.com › questions › 18738

   Dec 25, 2011 · Electric and magnetic fields can exist in a vacuum. When an electric field changes, it creates a changing magnetic field, and vice versa. Oscillations between those fields travel at the speed of light through the vacuum. That's the classical view, which does not involve photons.

5. www.youtube.com › watchCan light travel through a vacuum? - YouTube

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   Jan 23, 2013 · In contrast, light waves can travel through a vacuum, and do not require a medium. In empty space, the wave does not dissipate (grow smaller) no matter how far it travels, because the...

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   • Author: Tech·WHYS

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7. www.physicsforums.com › threads › how-does-lightHow does light travel Through a vacuum - Physics Forums

   www.physicsforums.com › threads › how-does-light

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   Jul 26, 2011 · How does light travel through a vacuum? In a vacuum, light travels in a straight line at a constant speed of approximately 299,792,458 meters per second. This is known as the speed of light and is the fastest speed possible in the universe.

8. www.physicsforums.com › threads › can-light-travelCan light travel through a vacuum? - Physics Forums

   www.physicsforums.com › threads › can-light-travel

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   May 13, 2003 · Yes, a vacuum is necessary for light to travel at its maximum speed. In any other medium, such as air or water, light will encounter particles that can slow it down. However, in a vacuum, there are no particles to interact with, allowing light to travel at its maximum speed without any obstructions.

9. howeverythingworks.org › 2006/10/26 › question-1546How can light travel through vacuum? – How Everything Works

   howeverythingworks.org › 2006/10/26 › question-1546

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   Oct 26, 2006 · The fact that light waves can travel in vacuum, and don’t need any material to carry them, was disturbing to the physicists who first studied light in detail. They expected to find a fluid-like aether, a substance that was the carrier of electromagnetic waves.