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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.
There are at least two ways that we know light can travel through a vacuum. The first is by observation of the Sun and other stars. Astronauts have measured the pressure in outer space and found that there is a very good vacuum, much better in fact than that which we can easily make on earth.
Jul 26, 2011 · I think I understand the basics that, light as it travels through a vacuum oscillates between a magnetic field and a electric field at 90 degrees to each other. How does this all, get a photon from point A to point B in a vacuum if there is no "ether" with which a photon can travel within?
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.
May 20, 2016 · For instance, how is it that light can be apparently without mass, but still behave as a particle? And how can it behave like a wave and pass through a vacuum, when all other waves require...
Unlike sound, light can travel through a vacuum — it doesn't need a medium.It can travel through transparent materials such as glass, water, and air. (A material light can't travel through is said to be opaque .)
The classic experiment to show that light can radiate across a vacuum, but sound requires a medium through which to travel. Apparatus and Materials. Vacuum pump; Clapper bell in round flask; Nichrome wire (26 SWG), reel of; T-piece; Hoffman clip; Rubber bung to fit flask; Bourdon gauge; Voltage supply, low, (typically 12 V at 6 A) Health ...
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