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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. Light is observed as traveling at velocity v=c, according to the second postulate of special relativity. But according to ...
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. Maxwell's equations tell us that a magnetic field changing in time causes an electric field to change in space, and an electric field ...
Mar 6, 2018 · Can light travel in a straight line in a vacuum? Yes, light travels in a straight line in a vacuum. This is because there are no particles to scatter or reflect the light, causing it to travel in a specific direction. Does light always travel at the same speed in a vacuum? Yes, the speed of light in a vacuum is constant and is approximately ...
Jan 5, 2015 · The same phenomenon in a reduced form may be observed in a thought experiment where an astronaut makes a space roundtrip near speed of light. He may travel 2000 light years in 2001 years which are reduced for him by time dilation and length contraction to about 2 light years in about 2 years.
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 ...
Unlike sound waves, light waves can travel through a vacuum close vacuum Empty space, where there is no solid, liquid or gas present. – they do not need a substance to travel through ...
Jan 27, 2023 · Since light travels like a wave, it can travel through a vacuum without interacting with anything. However, when light does go through something, that object can absorb some of it. Light travels through these objects, like glass and water, leaving heat behind. Think of a flashlight. When you turn it on and face it toward a pool, the light can ...
