What happens if a needle hits the Earth at the speed of light?

A needle is very small, but it still has a resting mass, and according to Einstein's theory of relativity, the needle cannot reach the speed of light, and theoretically it can only approach the speed of light infinitely. The fact that an object with a resting mass cannot reach the speed of light is a theoretical limitation, not a technical one. Secondly, if you want to achieve such a scenario, a needle flying at high speed through the earth, then you first need to ensure that the needle moves at high speed in the atmosphere and will not be "burned".

In space exploration, human beings have achieved manned spaceflight, so when astronauts return from space, they need to go through the friction process of the atmosphere, which will heat the returner. The mechanism of action is divided into two aspects: first, frictional heat generation between the object and air, but the influence of frictional heat generation accounts for only a small part; The second is that the high-speed moving object will compress the air in the forward direction, and the work done on the gas will finally be converted into heat, and the hot air will flow through the surface of the object, and the general material will be melted.

The second point is an example, everyone is clear, when inflating the car at home, the "air pipe" is used, when the continuous compression operation, the equipment will heat up, which is the compressed air is actually doing work on it, and it will eventually be converted into heat. Then a needle, especially if it moves at far supersonic speed, may "disappear" at the moment of starting, and here it can only be assumed that this needle is a future material, which can resist high temperatures and is not afraid of friction.

These two premises are solved, and they all become idealized models, first of all, the needle is infinitely close to the speed of light, then according to the qualitative increase effect of special relativity, the relativistic mass of this needle is close to infinity. When the speed of motion of an object is close to the speed of light, or in a state of sub-light, the formulas in classical mechanics are no longer applicable, and the theory of relativity has almost revised all the formulas of classical physics. Then this needle, which is close to the speed of light, must be discussed with the revised formula of the theory of relativity.

In a conventional low-speed world, the formula for the kinetic energy of an object is one-half mass multiplied by the square of the velocity, but when moving close to the speed of light, if there is a normal formula, then the final error will be large. This is where a more accurate formula is needed. All classical physics formulas are approximate calculations in low-speed worlds, and sub-light worlds are not something that classical physics can handle.

When the v in the equation is infinitely close to the speed of light, then the kinetic energy of the needle will be very large. Destroying an Earth is no problem. In particular, the object with a resting mass is constantly accelerating, and the relativistic mass is not constantly increasing, theoretically speaking, it is likely that this needle will form a black hole, after which the earth will be sucked directly into the black hole and become the form of energy.

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First of all, it is unimaginable how fast the speed of light is. I think if a needle hits the earth at the speed of light, the earth will be like a balloon we blow, in an instant.

Even if a needle moves at the speed of light, the energy it contains is infinite. If he hits the earth, then it will penetrate the earth and cause a catastrophe for the earth.

If a needle hits the earth at the speed of light, then the earth is likely to be broken down by it, because the speed of light is very fast, so under the action of speed, it is likely to cause serious consequences to the earth.

If it hits the earth, then the earth will be penetrated, and a light will cause earth-shaking vibrations, which is very terrifying, so the speed of light of a needle is also very powerful.

A needle hits the Earth at the speed of light, then there will be some serious problems. Maybe the earth will really be penetrated under such an action, which is particularly terrifying, then such a needle is also very powerful.

If there really is such a needle, thenAt least it has to be changed by Sun Wukong's golden hoop stick, because nowNeedles made by humans, at allIt is difficult to support acceleration to the speed of light, and it becameIocic, that's allIt can't reach Earth

Let's assume that Sun Wukong is willing to use his golden hoop stick to do this experiment, then Sun Wukong will definitely regret it, because of such a collisionNot only may his Huaguo Mountain be gone, it is estimated that the entire earth will not exist, and it is more likely that his golden hoop stick will also be gone

InEinstein's theory of relativity, quality is divided into two concepts, namelyDynamic quality and static quality。Why is there such a difference? Because according to the theories of physics experts,Time and space are relative to each otherThe mass of an object is related to the force and gravity of space-time, and to determine the mass of an object, it is necessary to choose a relatively stable space-time environment.

Static mass refers to the mass of an object when it is in a stable state of static start and stop relative to a certain space-time environment. Whereas, dynamic mass is the mass calculated by an object in its moving space-time environment.

According to Albert EinsteinThe mass-energy equation e=mc(E is the energy of the silver table, M is the mass, and C is the speed of light), according to the mass of the needle, after calculationThe approximate kinetic energy produced is joulesWhat is this concept?

Imagine the power of the atomic bomb **, the atomic bomb "Little Boy" that bombed Hiroshima,The equivalent is less than 20,000 tons of TNT。And the kinetic energy of this light-speed needle is equivalent to multiplying the calculation result by 4 to get the equivalent of how many TNTsThe number of 14 zeros has reached ten trillion digits, this is the energy produced after the needle accelerates to the speed of light and crashes into the Earth.

According to this energy estimate, wordsThe earth will certainly be difficult to keep

Here it is, thoughTwo factors that cannot be determined

The first is that Sun Wukong's golden hoop stick may not be able to insist on accelerating to the speed of lightAs long as the needle is composed of metal elements, which creates friction in the atmosphere at the speed of light, and the oxygen and helium in the air will immediately occur with themFusion reactions, so it hasn't approached the stratosphere yet, it willTurns into a plasma blaster, the harm caused to the earth is very limited.

In addition, the whole process of inference is calculated according to Einstein's mass-energy equation, howeverWhether this equation applies to this situation is unknownWe are not capable of doing such an experiment, and the results obtained here are just to satisfy everyone's curiosity.

There is a possibility that the earth will have volcanic eruptions, floods and beasts, and it will definitely be destroyed, because the power brought by the speed of light is too great.

If you hit the Earth at the speed of light, it will rub against the Earth's atmosphere, and then it will spontaneously combust, and a shining meteor will appear on the Earth, which will not be destroyed.

If a needle hits the Earth at the speed of light, it will be like a meteor when it rubs against the atmosphere, and it will not be destroyed.

The earth does not reflect anything, it just passes through the earth.

A needle hits the Earth at the speed of lightIt burns out in the atmosphere.

In fact, a sewing needle traveling at the speed of light cannot penetrate the thick atmosphere above the Earth. Without ignoring friction, the faster the velocity of the object, the more power the friction has to convert kinetic energy into heat energy per unit of time, so when the velocity reaches a certain value, the object burns. What's more, at such a fast speed of light, this little needle will burn out in the atmosphere.

Other inferences:

Since the needle is a small object, the energy generated by the impact of the object is closely related to the velocity and mass of the object. Therefore, we can roughly estimate the kinetic energy of this needle through the kinetic energy formula MV about 9 10 12J, if it hits the ground, these energies will cause a radius of about 4,000 meters **, which is equivalent to the energy generated by 10,000 tons of TNT**.

People in this range will die directly, and those who are farther away will also be burned by the heat wave generated by **. However, this claim is not credible because when an object approaches the speed of light, the kinetic energy theorem is no longer able to calculate its kinetic energy correctly.

<> what would happen if a needle hit the Earth at the speed of light? What will happen to the planet? The universe is infinite, so anything is possible.

There are many more similar questions, such as what happens if a drop of water hits the earth at the speed of light? Can a person move at the speed of light? If you start thinking about it, your braincase will hurt a lot, although at this stage you can only look at these problems as **.

Black holes in the universe actually exist, so when the earth is swallowed by black holes and turns into dark matter, how will the humble fate of human beings change? Don't say it's impossible, anything is possible! Because the universe is infinite, unimaginably big!

What will happen if a needle hits the Earth at the speed of light? It's an interesting question. Due to the size of the needle, the weight is too light, and the damage to the earth should not be too great.

However, here I would like to go to this question from another angle. If a needle really wants to hit the earth at the speed of light, it will be absolutely difficult to do so.

According to the principles of modern physics, when an object is moving at high speed, its energy is proportional to its speed, and the faster the speed, the greater the energy, and the speed of any object in the world has been wiped out if it reaches the speed of light. According to the theory of cosmic expansion, its expansion rate is always greater than the speed of light, therefore, everything in the universe is moving away from each other faster than the speed of light, and even if a needle flies towards the earth, it will never be able to hit the earth, but will be farther and farther away. Assuming the mass of the needle is one gram, its speed is 300,000 kilometers per second.

TNT explosives, ** speed per second. Energy is calculated in terms of the square of velocity. The energy contained in 1 gram of needle is equivalent to the energy of tons of TNT explosives.

After entering the atmosphere, the needle vaporizes due to the high temperature generated by friction with the air, producing **, which is equivalent to tons of TNT explosives in the air**. It has an impact within a radius of several kilometers, and as long as it is not a densely populated area, the impact on the ground and the earth is limited. As for the theory of relativity, at the speed of light, the mass of matter would be infinite.

Let's talk about it after we have the experimental data.

If a needle hits the earth at the speed of light, then the earth will be greatly hit, and even produce **, thus changing the appearance of the geology!

According to the theory of relativity, it is impossible for an object with mass to reach the speed of light, and the mass at the speed of light is zero, and not a needle, so this is not true.

But a particle close to the speed of light is enough to destroy a star, and you can see that the energy of matter at close to the speed of light is unimaginable. If this is true of a particle, then how can it not be true of a needle? Due to the existence of the special theory of relativity, if an object were to fly towards the Earth at a speed close to the speed of light, would nothing happen, or would it destroy the Earth?

When the needle comparable to the atomic bomb sees this topic, many people must have begun to laugh, isn't it"Rain"?

Now, an imaginative question arises - what would happen if a needle crashed into the Earth at the speed of light? How do you accelerate a needle to the speed of light? First, we have to think about whether this is possible in this world, based on what we already know.

Even the Chicxulub meteorite, one of the worst impacts ever recorded on Earth, eventually led to the mass extinction of a species.

So many people ask, what would happen if a needle hit the Earth at the speed of light? What would happen if an alien civilization that was eyeing Earth today fired a needle at Earth, but the needle traveled at the speed of light? Will the Earth be blown directly through the center?

Speaking of which, if a very thin needle hits the Earth at the speed of light, will the Earth be pierced? Light is the fastest speed in the known universe. And this is exactly what mankind has been pursuing, because humans dream of being able to build a needle that moves at the speed of light, about 300,000 meters per second.

The Earth moves much slower, at 30,000 meters per second. If you use the law of conservation of momentum, you will find that the faster the car, the more destructive it will be. A needle weighs only a few grams.

What if it hits the Earth at the speed of light? How much damage will it cause? How will its impact change the Earth?

Will the Earth disappear in place or not exist at all. If you want to calculate the energy of a needle hitting the Earth at the speed of light, you can only use the relativistic mass-energy equation.