Why does light have a speed of 3 10000000 meters per second?

Because the speed of electromagnetic waves is that fast.

Light has wave-particle duality, and it shows wave-wave properties as it propagates. This wave is a kind of electromagnetic wave, and the speed of the electromagnetic wave is the ultimate speed of the universe, which is about 300 million meters per second. The wave property of light can be verified by the diffraction and interference phenomena of light.

Because photons are massless, according to the theory of relativity, matter will have infinite mass at the speed of light, and this problem does not exist for matter with 0 mass.

With a particle accelerator, the maximum velocity of an electron that can be obtained in the laboratory is. In the ideal environment of a vacuum, the speed of the particle can reach the so-called speed of light.

Summary. The Paris Observatory on the left bank of the Seine has a panel on the wall that says that the speed of light was first measured in 1676. In fact, this result is really unintentional.

At the time, Dane Ola Romer was an assistant to the Italian astronomer Giovanni Domenico Cassini, who wanted to find out why the time interval between adjacent eclipses of one of Jupiter's moons varied. Romer and Cassini discussed that the speed of light could be finite (before that, it was common to think that the propagation of light was instantaneous). Finally, after a rough calculation, Romer concluded:

The time it takes for a ray of light to travel a distance equal to the radius of the Earth's orbit is 10 minutes or 11 minutes. Later, Cassini changed his mind. He believed that if the speed of light was limited and the propagation of light would take time, then the delay of the eclipse should also be observed on other moons of Saturn, but in reality it did not.

The speed of light was controversial until 1728, when the British astronomer James Bradley discovered another way to measure the speed of light. Many subsequent experiments confirmed that Romer's original observations of the speed of light were 25 % slower. Today, we have determined that the speed of light propagation in a vacuum is kilometers per second.

The speed of light is about 300,000 kilometers per second.

The Paris Observatory on the left bank of the Seine has a panel on the wall that says that the speed of light was first measured in 1676. In fact, this result is really unintentional. At the time, Danish troublemaker Ola Romer was an assistant to the Italian astronomer Giovanni Domenico Cassini who wanted to find out why the time interval between adjacent eclipses of one of Jupiter's moons varied.

Romer and Cassini discussed that the speed of light could be finite (before that, it was common to think that the propagation of light was instantaneous). Finally, after a rough calculation, Romer concluded that the time it takes for a ray of light to travel a distance equal to the radius of the Earth's orbit is 10 or 11 minutes.

Later, Cassini changed his mind. He believed that if the speed of light was limited and the propagation of light would take time, then the delay of the eclipse should also be observed on other moons of Saturn, but in reality it did not. The speed of light became controversial until 1728, when the British astronomer James Bradley discovered another way to measure the speed of light.

Many subsequent experiments confirmed that Romer's original observations of the speed of light were 25 % slower. Today, we have determined that the speed of light propagation in a vacuum is kilometers per second.

The above is the answer to "the speed of light is about 300,000 kilometers per second", I hope the above content is helpful to you.

Hello dear dear I am glad to answer for you: the speed of light is about 300,000 kilometers per second, and the propagation of sound requires a mass of matter, which is called a medium in physics. Generally in the air 340m s propagation velocity.

Light has no mass, but there is spring sock energy and momentum, so light has speed. If light is a moving substance, what is there without velocity? If light has no velocity, is light stationary?

The speed of light is 299792458m s, and I have learned physics in junior high school. General physical calculations often use 3*10 8ms. Hope mine is helpful to you.

The speed of light is 300,000 kilometers per second, and its speed can be written as analysis: according to the way the speed is written, it can be solved Answer: Solution:

300,000 kilometers per second can be written 300,000 kilometers seconds, so the answer is: 300,000 kilometers seconds Comments: This question examines the knowledge points:

Rewrite correctly according to the speed of writing

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The speed of light is 299,792,458 meters per second, which is about 300,000 kilometers per second, not per hour. This speed is very fast, it only takes one second to circle the earth a distance of more than seven times, and it is the fastest speed in nature. This is also the basis of the theory of relativity, which tells us that the speed of light is a constant and is the same for all observers.

The speed of light has a wide range of applications in scientific research, such as astronomy, optics, relativity, and other fields.

The speed of light is about 300,000 kilometers per second.

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The speed of light is 299,792,458 meters per second, which is about 300,000 perturbation kilometers per second, not per hour. This speed is very fast, it only takes one second to circle the earth a distance of more than seven times, and it is the fastest speed in nature. This is also the basis of the theory of relativity, which tells us that the speed of light is a constant and is the same for all observers.

The speed of light has a wide range of applications in scientific research, such as state imitation in astronomy, optics, relativity and other fields.

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Extended: The speed of light is calculated: c0 = effect:

When the speed of an object approaches the speed of light relative to another object, the time of one object slows down relative to another, and the time change conforms to the Lorentz transform. In the 70s of the 20th century, it was confirmed that the speed of light is the maximum speed known, and the kinetic energy of an object is infinite when it reaches the speed of light, so it is impossible to reach the speed of light according to the current human cognition.

The question you ask is: "The speed of light is about 300,000 kilometers per second". The answer is:

Yes, according to the laws of physics, the speed of light in a vacuum is about 300,000 kilometers per second (also known as 300,000 kilometers per second), which is also an approximation of the speed of light in air. In addition, light has different speeds in different media, and it is faster or slower than in a vacuum scrambled macro. Therefore, the true speed of light depends on the medium in which it is located.

The speed of light is 300,000 kilometers per second, and the speed of an hour is 30 3600 108,000 kilometers per hour. 1 hour Youchang 3600 seconds.

300,000 kilometers of pure tung in seconds.

100 million kilometers per second 3600 seconds per hour.

Billions of gigawatts of metre-meter-hours.

1 small banquet with Weiliang = 60 minutes, 1 minute = 60 seconds, 1 hour of Lushan Lu = 3600 seconds.

300,000 km x 3,600 = 1,080,000 km = 100,000,000,000 km.

This is equivalent to 100 million kilometers per hour. 300,000x3600 seconds, 108,000 trillion.

1. A: The internationally recognized value is c 299792458 meters and seconds. Before the 17th century, it was thought that the speed of light was infinite, according to the Italian physicist G

Galileo had doubts about this and tried to test it experimentally, but it was too crude to succeed. In 1676, the Danish astronomer used the temporal variation of the eclipse of Jupiter's moons to prove that light travels at a finite speed.

year, British astronomer JBradley used the phenomenon of stellar light travel to estimate the speed of light to be c 303,000 km/s.

In the first successful measurement of the speed of light in a ground laboratory using the rotary gear method, the French physicist Fizo used the rotary gear method, and the earliest result was c 315,000 kilometers per second. In 1862, the French experimental physicist J-b.

l.Foucault according to D f.

j.Arago's assumption uses the rotating mirror method to measure the speed of light as c hungry (298,000 500) kilometers and seconds.

In the middle of the century, Maxwell established the theory of electromagnetic fields, and he pointed out that the propagation speed of electromagnetic waves in a vacuum is equal to the ratio of the electrostatic unit of electricity to the electromagnetic unit of electricity, and the wave speed of electromagnetic waves can be calculated as long as the same electric quantity (or current) is measured in these two units experimentally.

year, rKohlrausch and WWeber completed the measurements, and Maxwell calculated the velocity of electromagnetic waves in a vacuum as kilometers and seconds based on their data, which is very close to Fizo's results, which has played a large role in confirming that light is an electromagnetic wave.

In 1929, the American physicist Michael Erson improved Foucault's experiment and measured c (299796 4) km/s, which he redid in a vacuum in 1929 and measured c 299774 km/s. Later, some people used optical switches (Kerr boxes) instead of gears to improve Fizo's experiments, which were two orders of magnitude more accurate than the rotating mirror method, and the British experimental physicist Ferrom used the microwave interferometer method to measure the speed of light, and obtained c (kilometers and seconds). This value was recommended for use as an international recommendation in 1957 until 1973.

In 1972, Evenson et al. in the United States directly measured the laser frequency and wavelength in the vacuum, and calculated c (299792458 meter seconds according to the formula c.

The 15th International Conference on Weights and Measures confirmed the above speed of light values as international recommended values. In 1983, the 17th International Conference on Weights and Measures adopted a new definition of meters, in which the speed of light c 299792458 meters and seconds is the specified value, and the length unit meter is defined by this specified value. Now that the speed of light in a vacuum has become the defining value, there is no need to make any measurements of the speed of light in the future.

One day = 24 hours 365 * 24 = 8760 (hours) 8760 * 60 = 525600 (minutes and shouts dry grip).

525600*60=31536000 (seconds) 31536000*30=946080000 (10,000 kilometers).