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Aug 12, 2012 · Does light need a medium in order to travel? Answer. Dominic - This has to do with two theories of physics called quantum mechanics and special relativity. And the question that was troubling physicists about 100 years ago was whether light is a particle or a wave.
So it is an experimental fact that light does not need a medium to propagate. One thing that I'm surprised to know is that light is also called an electromagnetic wave. Does this include light of any kind, for example: light from a bulb, a tube, and also from the Sun?
- How far does light go? how long does light go. - Jason (age 11) A: Hi Jason, Light just keeps going and going until it bumps into something.
- less than one photon? Can light intensity reduce to a level where it's energy is less than 1 photon (probably after travelling an almost infinite distance from a point source)?
- stars too far away to see? does there is any star that we can can't get it's light because of itis farness?...... sorry with having any problems in my English gramer, my English language is not good enough.
- light going out to space. If we are reflections of light, does that reflection make it out into space and keeps traveling til its asorbed.
Apr 24, 2017 · Light travels slower in a medium than it does in a vacuum, and the speed is proportional to the density of the medium. This speed variation causes light to bend at the interface of two media — a phenomenon called refraction.
Jun 8, 2022 · Light, or electromagnetic waves, are just that, waves in the background electromagnetic fields. You could argue that they indeed have a medium, the EM field. This is similar to sound, which is pressure waves in a substance.
Electromagnetic radiation doesn't need a medium to travel through, and, when it's traveling in a vacuum, moves at 186,000 miles per second (300,000 kilometers per second). Scientists refer to this as the speed of light, one of the most important numbers in physics.
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Aug 10, 2016 · Electromagnetic waves differ from mechanical waves in that they do not require a medium to propagate. This means that electromagnetic waves can travel not only through air and solid materials, but also through the vacuum of space.
