Which is faster, light or sound?
To the question: What is faster, light or sound? given by the author Little-mousy the best answer is Naturally light. The speed of light in a vacuum is the limiting value of this kind and is 300 thousand kilometers per second (by the way, it is different in different environments). The speed of sound is much lower - depending on the propagation medium, it varies by hundreds and thousands of meters per second.
Answer from 22 answers[guru]
Hello! Here is a selection of topics with answers to your question: What is faster, light or sound?
Answer from User deleted[guru]
light
Answer from Summer[guru]
Light!
Answer from User deleted[guru]
light, moreover, 1000 times faster
Answer from Yovetik[guru]
Light, of course.
Answer from User deleted[guru]
Light.
Answer from Best[guru]
I don’t like doubles!!!
Answer from Ivan Malienko[guru]
Depends on the propagation medium, although the light should still be faster...
I didn't do well at school
Answer from User deleted[expert]
Light, naturally, the speed of light is the fastest
Answer from Dima Kaminsky[master]
The speed of light is 300,000 km/sec and sound is 340 m/sec; compare it yourself!
Answer from Alina Starikova[newbie]
Speed of light 300,000,000 m/s
speed of sound in air 340 m/s
The speed of light is a million times faster and is the maximum speed in nature.
Light can travel in a vacuum (airless space), but sound needs a medium - the denser the medium, the faster the speed of sound. For example, after rain, sounds are heard better and more clearly. In ancient times, in order to hear how far away the enemy army was, they put their ear to the ground.
To hear the sound of an approaching train, put your ear to the rails - because in denser environments the speed of sound is greater
Answer from ARTEM FEDOROV[newbie]
The speed of sound is greater than the speed of light!
Experience of scientists from the University of Tennessee
Such a striking result was demonstrated by William Robertson from the University of Tennessee (Middle Tennessee State University), together with colleagues, as well as a number of students from other educational institutions.
The researchers built a kind of “loop” from a plastic pipe, designed so that in it a group of individual sound impulses that made up the overall impulse were separated and then brought together again. The authors called this device an asymmetric filter. As a result, it turned out that sound passed through the pipe travels faster than light moves in a vacuum.
Of course, in this case we are talking about the so-called group velocity - that is, the speed of movement of the peak of the total impulse obtained by mixing a large number of small waves of several frequencies.
Each individual wave in this packet did not move faster than light, no miracle, of course, happened. But the authors of the experiment say it will help develop methods for faster transmission of electrical impulses in communication systems. Read more in the article by the authors of this work in Applied Physics Letters.
Previously, physicists from another American university built an installation in which the speed of sound increased by five orders of magnitude. They also calculated that under certain conditions the speed of a sound pulse (group) can exceed the speed value c, which has now been demonstrated in practice by testers from Tennessee.
Let us also add that tricks with group velocity, but not of sound, but of a light pulse, previously led to even more amazing results. Thus, physicist Robert Boyd from the University of Rochester slowed down light to 57 meters per second back in 2003.
And last year he carried out an even more impressive experiment: he received light with a negative speed, at which the peak of the impulse moved not from the source, but towards it. Moreover, in that experiment, another “hump” of the light pulse was even ahead of time, since it came out of the end of the installation before hitting its beginning.
There was an article by scientists who conducted research. They were shocked. A certain particle, I don’t remember its name, passed through the liquid faster than the speed of light. This is from the point of view of accessible physics.
From the point of view of paraphysics, there must be particles that carry information. With their help, telepathy occurs. The speed of their spread is clearly demonstrated by the imagination. Just imagine yourself flying through space and approaching the nearest star within seconds. So, this speed is not the limit, and you, or rather one of your “selves,” really flew informationally towards the star, and this “something” consists of these superluminal particle-waves. And similar velocities are exhibited by particle-waves during torsion coupling.
As you understand, this does not change either science or physics.If we talk about the speed of sound, we must ask: in what medium?
The speed of sound in air is about 335 m/sec. But this is at a temperature of 0° C. With increasing temperature, the speed of sound propagation also increases. No environment - no sound. If a vacuum is created in some volume, sound will not be able to propagate in it. This is due to the fact that sound travels in waves. A vibrating object transmits its vibration to neighboring molecules or particles. Motion is transferred from one particle to another, which leads to the appearance of a sound wave.
Darkness is faster
The speed of thought is equal to the speed of transmission of electrical impulses, which is anyway less than the speed of light.
rainbow on the sides
From chemistry lessons, I know that the speed of light is about one million faster than the speed of sound. But the speed of sound and light can change. The approximate speed of sound is approximately 1450 m/s. But this is not a constant value, it can vary depending on the conditions where it passes, simply through the air or in water, and depends on the ambient pressure and temperature. That is, there is no definite concept of the speed of sound, but there are already approximate figures. The speed of light in vacuum is 299,792,458 m/s. Until now, smart people in their laboratories are experimenting with detection by creating new instruments and doing new experiments. 299792458 m/s this speed is considered more accurate; it was identified more accurately in 1975, and in 1983 it began to be used in the International System of Units (SI). Most often, in order to solve a school problem, teachers allow the numbers to be rounded to exactly 300,000,000 m/s or (3?108 m/s). As for lightning and thunder, it seems to me that they do not depend on each other and the laws of the speed of light and sound do not apply here.
Yes, everything is exactly the opposite. The speed of sound in the atmosphere is about 342 meters per second, and light travels about 300 thousand kilometers in 1 second. These values are completely incommensurable. And first we see lightning, then we hear thunder.
It is believed and proven that light is much faster in speed than the speed of sound. When thunder roars, you can first notice lightning, its light, and its appearance in the sky precedes the sound of the thunder that follows it, and since there is a very short period of time between them, it seems to you that thunder comes first.
The speed of light is incomparably greater than the speed of sound (300 thousand m/sec). During a thunderstorm, we first see lightning, and then we hear thunderclaps. If there are a lot of peals and they are frequent, you can confuse which lightning corresponds to which thunder. Hence the error.
The speed of light is faster, this can be clearly seen in the example of thunder and lightning. The first thing we see is a flash of lightning in the sky and only a few seconds later the sound of thunder is heard. The further the thunderstorm goes, the longer the thunder will take to reach us.
Everyone answered the question well and there is nothing to add. But it seems to me (this is just my personal opinion) that the fastest thing is the speed of thought))) We can mentally overcome such distances that it will take the light centuries to get there)))
If we first heard thunder and then saw lightning, then this lightning refers to a completely different thunder. To put it simply, a thunderstorm looks like this: flash - thunder, flash - thunder, and not vice versa. Light travels much faster.
The speed of light is higher than the speed of sound, so if during a thunderstorm you first heard thunder and then saw lightning, then most likely the epicenter of this thunderstorm was located quite far from the point where you were, and you heard the thunder accompanying the previous flash lightning, and the lightning you saw was the next one, and after a while it was supposed to be followed by thunder again.
In my opinion, you are mistaken - just the opposite: first we see lightning, and then we hear thunder. As a child, our favorite pastime during a thunderstorm was to see lightning and count how many seconds later the thunder would thunder (since the speed of sound in air is approximately 1/3 km per second, then by dividing the number of seconds by 3, you can find out at what distance from a thunderstorm is upon us, and it is approaching or moving away).
More precisely, the speed of sound in air is 331 m/sec., and that of light is almost a million times faster (299,792,458 m/sec.)
I first discovered that the speed of sound lags significantly behind the speed of light in early childhood, when I had no idea at all about the laws of physics. Opposite my house, about 200 meters away, there was a volleyball court. I often watched adults play from the balcony. And I was very surprised when I noticed that I heard the impacts of my hands on the ball with a delay. That is, they hit the ball as if silently, and the sound of the hit began to be heard only when the ball was already flying. Later I understood why this was happening. The speed of light is extremely high - 300,000 km per second. It is believed that this is the maximum physical speed that can be in this world. The speed of sound in air is very small compared to the speed of light, only about 340 meters per second. Some planes fly faster, which is why they are called supersonic.
