Gravity can bend light, so how far is the focal length of the gravitational lens corresponding to th

Theoretically, the gravitational pull of any celestial body can bend light, but the degree of bending is not the same, taking our sun as an example, during a total solar eclipse, you will find that the position of the stars near the sun has changed, and the focus of the sun's gravitational lens is about 1000 astronomical units (light years) from the sun.

In the general theory of relativity, it is believed that the essence of gravity is the curvature of space, but in a weak gravitational field, the phenomenon of gravity can be approximated by the law of universal gravitation, and Einstein originally predicted the angle of deflection of light rays as they pass near the sun.

In 1915, the British scientist Eddington successfully measured the deflection angle of the light rays of distant stars when they passed the sun with the help of a rare total solar eclipse, and the results were basically consistent with the predictions of relativity, but far from the predictions of Newtonian mechanics, and this result became an important experiment to verify the general theory of relativity.

The mass of the sun is as high as 2*10 30kg, and the escape velocity is the earth, and the light deflection caused by its gravity is very weak, so the light deflection caused by the earth's gravity will be even weaker.

According to Einstein's prediction, space-time near massive celestial bodies will undergo large distortions, causing light rays passing near the celestial bodies to bend, and if the observer is in a straight line of "light source-celestial body", then the observer may see one or more light source images, a phenomenon called gravitational lensing.

Gravitational lensing was first observed in 1979, and now microgravitational lensing has played an important role in astronomical observations, such as:

In 2008, scientists used microgravitational lensing to detect that the OGLE-06-109L star system, 5,000 light-years away from Earth, has two planets, with the masses of the planets being one and one Jupiter, which is simply impossible to achieve with traditional observation methods.

For example, in the image above, the NGC 7250 galaxy in the constellation Scorpio is located in the constellation Scorpio, and there is a very bright star in the galaxy, which is actually a supernova, 45 million light-years away from Earth, and scientists have observed such a clear image with the help of gravitational lensing, and the observation distance is 100 times closer than the actual distance.

For the sun, the gravitational lensing effect can also be formed theoretically, and the focal length corresponding to the sun's gravitational lens is about 1,000 astronomical units, that is, 150 billion kilometers.

The gravitational lensing of the sun has a focal length of 1,000 astronomical units, or 150 billion kilometers, which is very far away from the earth.

This gravitational lens focal length can reach a distance of 1000 km, which is completely limited by the size of the volume.

The focal length is about a kilometer away and can be calculated according to the formula specified by physics.

Does gravity change the speed of light? What a question! But before I use Gordon's theory of everything, I'd like to ask a few more questions.

Do physicists know how gravitational fields are created? We know what produces the gravitational field (mass), but we don't know the mechanism by which the gravitational field is generated.

Why does gravitational field affect light? It is hypothesized that mass bends space-time, creating a gravitational field, but physicists are not yet aware of this mechanism.

It is well known that the gravitational field affects the passage of time, but its mechanism is still unknown, and it is only understood that it is the correct observation and the mathematical way to interpret this observation.

What I'm medium-sized trying to figure out is ......There are many missing pieces in this puzzle. The missing piece is not missing in Gordon's theory of all things so keep that in mind and I'll have your question.

Gordon's theory of everything reveals that all energy in the universe exists in three Gordon states. Physicists know only two of these energy states, the energy of mass (proportional to C2) and the energy of light (proportional to C1). The fundamental energy state is the energy associated with the structure of space-time itself, which is proportional to c 0.

Light is moving energy at a speed of c 1 and the energy passing through space-time is proportional to c 0. Gordon's theory of all things defines the speed of light as the speed at which energy must move through energy to maintain Gordon's energy state.

Let's start by imagining that our universe has no matter, only light and space-time (two Gordon states). The e0 energy along the path determines the speed at which the light energy travels through the path. Light moves a certain amount of energy within a quantum unit of time.

Thus, the e0 energy determines the "relative" quantum distance. Quantum distance is the distance traveled by light in one quantum unit of time. (Note that the ratio of quantum distance to quantum time units must always be equal to 1.)

>Since quantum distances are relative, the speed of light is also relative....But measuring the speed of light in any space-time, regardless of the E0 energy concentration along the path, it is always measured as c 0. Physicists don't know the e0 energy of space-time because it is inaccessible, but it is this energy that determines the existence of the speed of light.

Now that we have determined the speed at which light passes through energy, let's add the e2 energy of the mass. Physicists don't know this either, but all energy fields are generated by the interaction of e1 and e2 energies with potential space-time e0 energies. Particles containing mass extend the E2 energy field indefinitely.

The gravitational field is the coexistence of E2 energy with space-time.

Now, you have the answer ...... your questionLight slows down in the gravitational field because there is more energy in its path. The energy along the path can be any energy of any Gordon energy state. The bending of light (and what determines "straightness") depends on the presence or absence of an energy gradient, i.e., the photon has less energy on one side of the path than on the other.

It changes the speed of the light because after the light is bent, its resistance increases and the speed slows down.

Yes, it changes the speed of light, scientists have demonstrated.

The speed of light is immutable, that is, the speed of light is a fixed value, and there is no such thing as fast light and slow light. The existence of the speed of light is actually a cosmic constant, which will not be accelerated or slowed down by the Zheng Yu environment in which it is located or by the influence of some external forces. Therefore, gravity cannot change the speed of light.