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- Yes, light can travel through a vacuum. A vacuum is an area devoid of matter, including air molecules, which are usually responsible for scattering and absorbing light. Therefore, in a vacuum, light can travel unobstructed in a straight line.
www.physicsforums.com/threads/can-light-travel-through-a-vacuum.2041/
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.
- visible light
The spacetime interval of photons is reduced to zero, that...
- visible light
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.
- 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.
Jan 5, 2015 · The spacetime interval of photons is reduced to zero, that means that they do not travel through spacetime, their momentum is transmitted directly from one place to another. The only observable trace they are leaving in spacetime is an electromagnetic wave moving at light speed c.
Jul 16, 2020 · It can travel through a vacuum. It always moves at a constant speed, known as the speed of light, which is 300,000,000 meters (186,000 miles) per second in a vacuum. And the wavelength defines the type or color of light.
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, which needs a medium (like air or water) to travel through, light can travel in the vacuum of space. Light travels in straight lines. Once light has been produced, it will keep travelling in a straight line until it hits something else. Shadows are evidence of light travelling in straight lines. An object blocks light so that it ...
