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1. • • 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.
     physics.highpoint.edu/~jregester/potl/Waves/Light/NatureOfLightA.htm

     Nature of Light A - High Point University

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.

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

   physics.stackexchange.com › questions › 109982

   May 2, 2014 · Light travels through a vacuum like rocks do. Unlike something like 'waves in water', light is to be thought of as something between particle and wave.

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5. physics.highpoint.edu › Light › NatureOfLightANature of Light A - High Point University

   physics.highpoint.edu › Light › NatureOfLightA

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   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.) In a vacuum, light travels with speed 3.00 x 10 8 m/sec.This speed is given the symbol c. In a transparent medium, light slows down ...

6. byjus.com › question-answer › can-light-travel-in-vacuumCan light travel in vacuum? - BYJU'S

   byjus.com › question-answer › can-light-travel-in-vacuum

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   Light from sun reaches earth through the vacuum present in the space. Light does not require any medium to travel. However, Light can also travel in medium like air, water and solids.

7. van.physics.illinois.edu › ask › listingDoes Light Travel Forever? | Physics Van | Illinois

   van.physics.illinois.edu › ask › listing

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   • 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.

8. physics.stackexchange.com › questions › 156606visible light - How do electromagnetic waves travel in a ...

   physics.stackexchange.com › questions › 156606

   Jan 5, 2015 · How does an electromagnetic wave travel through for example, the vacuum of space? I usually see that waves are explained using analogies with water, pieces of rope, the strings of a guitar, etc, but it seems to me that all those waves need a medium to propagate.

9. phys.org › news › 2016-05-how-does-light-travelHow does light travel? - Phys.org

   phys.org › news › 2016-05-how-does-light-travel

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   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...