Where does the light travel from?
Light waves travel out from their source in straight lines called rays. Rays do not curve around corners, so when they hit an opaque object (one that does not allow light to pass through it), they are blocked from reaching the other side of that object. We see a dark shadow in the area from which light is blocked.
Light travels in a straight line.
This is why light from distant stars can travel through space for billions of light-years and still reach us on earth. However, light can also travel within some materials, like glass and water. In this case, some light is absorbed and lost as heat, just like sound.
Light exhibits characteristics of both waves and particles, the latter of which are described as packets of energy called photons. These waves, or photons, travel in narrow beams called rays. Only when light rays move from one medium to another, such as from air to water, are their linear paths altered.
Light has the maximum velocity in vacuum. Light shows the maximum velocity in a vacuum. So there is a vacuum in the options, you can be sure that it is the medium through which light travels faster. Air also has a refractive index very close to one (n=1.003) but not less than vacuum.
Since the speed of light is the same everywhere along all possible paths, the shortest path requires the shortest time.
Any physics student knows that light travels in a straight line. But now researchers have shown that light can also travel in a curve, without any external influence. The effect is actually an optical illusion, although the researchers say it could have practical uses such as moving objects with light from afar.
The main reason why light moves in straight lines are because it is a wave and prefers to travel the smallest distance between the two points. Light, however, can diverge from a straight trajectory when it strikes certain obstructions. Diffraction is a popular name for this phenomenon.
Light Travels Along a Straight Line
Light travels at a speed of 186,000 miles per second. You must have observed that in your house that whenever a beam of light enters a dark room through a tiny hole in the window, the lightwave always travels in a straight line.
No, in fact light only stops when it is absorbed by an electron in an atom of an object. Light in a perfect vacuum travels on at its full speed until it hits something.
Does light travel to infinity?
Light, by definition, is an electromagnetic wave, a propagating disturbance in space and time that carries information about the acceleration of charges. Were there an infinite value for the speed of light, light itself would not exist at all.
But Einstein showed that the universe does, in fact, have a speed limit: the speed of light in a vacuum (that is, empty space). Nothing can travel faster than 300,000 kilometers per second (186,000 miles per second). Only massless particles, including photons, which make up light, can travel at that speed.
It also behaves as both a wave and a particle, able to propagate through mediums (like air and water) as well as space. It has no mass, but can still be absorbed, reflected, or refracted if it comes in contact with a medium.
Unlike sound, which needs a medium (like air or water) to travel through, light can travel in the vacuum of space.
A light-year is the distance that light can travel in one year — about 6 trillion miles (10 trillion kilometers). It's one way that astronomers and physicists measure immense distances across our universe. Light travels from the moon to our eyes in about 1 second, which means the moon is about 1 light-second away.
In short, space-time would contain the entire history of reality, with each past, present or future event occupying a clearly determined place in it, from the very beginning and for ever. The past would therefore still exist, just as the future already exists, but somewhere other than where we are now present.
So, according to de Rham, the only thing capable of traveling faster than the speed of light is, somewhat paradoxically, light itself, though only when not in the vacuum of space. Of note, regardless of the medium, light will never exceed its maximum speed of 186,282 miles per second.
Darkness travels at the speed of light. More accurately, darkness does not exist by itself as a unique physical entity, but is simply the absence of light. Any time you block out most of the light – for instance, by cupping your hands together – you get darkness.
Light travels in straight path. So, it cannot travel through a bent pipe.
Light is always moving. It never can be at rest ,hence it can't be stopped in the sense you're thinking. However let me explaine what does it mean by stopping the light in quantum physics. Scientists have stopped light for one minute.
Where does light travel the slowest speed?
It travel slowest in Diamond.
A ray of light always travels in a straight line. It always tends to follow the quickest path between two points which is a straight line for a given medium. Q. Jayanti travels from A to B, either by walking the straight path AB or walking the zig-zag path.
The Rectilinear Propagation of Light describes that Light travels in a Straight Line. A mirror changes the direction of Light that falls on it and it travels in a Straight line Path. Reflection of Light occurs when light bounces off a polished surface.
Mathematical solutions to Maxwell's equations suggest that it is possible for shape-preserving optical beams to bend along a circular path. Apart from the broadening effects of diffraction, light beams tend to propagate along a straight path.
The earliest surviving optical treatise, Euclid's Catoptrics1 (280BC), recognized that light travels in straight-lines in homogeneous media.