In what form does light reach the earth?

There is no absolute vacuum in space, there is a small amount of air, and there is something that seems to be called the aether. Why does light reach the earth? In fact, it is the duality of light particles, the propagation of light is not continuous, but one by one, and the light particles are like basketballs, reaching the earth one by one.

Photons also have mass, so the heat energy can be explained by e=mc2. The space shuttle is very hot in space, unlike the airplane flying near the earth, the former is illuminated by sunlight or other luminous substances, and heat. The latter generates heat by friction with gases in the atmosphere, and as long as the shuttle is not close to the sun, the latter produces much more heat than the former.

The last two questions are not good, I think that space should not be pitch black, but very bright. When the Earth is dark at night, it is thought that it is away from the sun, but in space, as long as it is close enough to the sun and not obscured by other stars, it should be bright all the time. Humans should not be alone, there should be other creatures living on other planets!

Light has wave-particle duality, it is a particle, but also a kind of radio wave, the universe is vacuum, in fact, light is driven by the sun's "nuclear fusion" energy to push light, accelerate away, later with the help of the solar wind, push these escaping materials, radiation to the universe, it is said that Voyager 1 and 2, who have left the earth for nearly 30 years, have now reached the outer edge of the solar system, and can still feel the influence of the solar wind.

Sunlight travels to the earth through magnetic field particles in a vacuum. Because magnetic field particles have no mass, magnetic field particles do not consume energy, so they cannot do work, so space is dark and bright, and sunlight can travel 20 billion kilometers.

Light is transmitted to the earth through light waves, which are long and short.

The light of distant galaxies in the universe is transmitted to the earth by light. The gravitational pull of the Sun certainly affects the way the Earth receives light from distant stars. All substances affect each other, and this influence is directly related to the mass of the object and its distance from each other.

For example, a black hole has such a mass that nearby light and radiation are absorbed directly into the black hole, so we can't see the black hole. Then, a little light farther away from the edge of the critical distance can escape, but it will also leave a curved trajectory that forms the event horizon of the black hole that we can see.

<> the sun has a pitifully small mass compared to black holes, and the same is true compared to most stars in the universe. But in any case, it is much larger than the Earth. Keep in mind that the size of the Sun is about 1.3 million Earths and its mass is about 330,000 Earths, so it will of course affect how light travels to Earth.

When light passes over a massive object, a noticeable deflection occurs (gravitational lensing in general relativity), which means that the light no longer travels in a straight line through the universe. How do we determine the exact location of stars or other luminous objects far from Earth with various complex deflections (especially the presence of dark matter and black holes that complicate light propagation)?

Physics is a quantitative science in which observations are matched to theoretical equations. For the observation of the star, and can reflect its own properties such as mass density and other physical quantities, it must be estimated by observation (such as spectral analysis, shape estimation methods), so that the contribution of its active tensor theory to the curvature of space-time can be calculated, if it is next to the star, then the direct light through the nearby bend, we observe the result and its true position, or there is a deviation, this deviation can be calculated theoretically. For the observation of gravitational lensing, all the data interpreted by the general relativity model are highly matched in accuracy.

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The speed of light is very fast, it travels through a medium, and it is able to travel to the earth.

I think that if these flowers are spread in the universe, as long as there is no influence of other substances or other factors, these lights can be transmitted to very far places, even after a very long time.

Since these galaxies are irradiated by the sun, this light is reflected so that it can travel to the Earth and be visible to the Earth.

The sun is a planet formed by the universe, it is fused and exothermic all the time, and light has wave-particle duality, he is a wave that can be transmitted by itself and does not need a medium.

1.It takes about 500s for sunlight to travel to the earth.

2.The formula is: v=st

3.The distance of sunlight to the earth s=vt=3 10 to the 8th power 500s sunlight is the most important natural light source, it shines on the earth, making the whole world purple and red, colorful. When light changes over time and the weather changes, it will directly affect the color of the object.

In addition to sunlight, there are various other light sources, such as the lights we use in our daily lives, which are artificial light sources, much weaker than sunlight, and contain a different proportion of visible light than sunlight. In general, the light emitted by incandescent lamps tends to be reddish and yellow, while the light emitted by fluorescent lamps is bluish.

We know that the distance between the Sun and the Earth is actually very long, 150 million kilometers. Watching the sun shine on the earth every day, do you think about how long the sun's rays need to travel in space before they reach the earth?

The speed of light is about 300,000 kilometers per second, so we can use the kinematic formula learned in China to calculate the time it takes for sunlight to travel from the Sun to the Earth.

Formula: t=s v so we get.

15000000km (300000km s) = 500 seconds 8 minutes 20 seconds.

From the above calculations, we can see that it takes 8 minutes and 20 seconds for light to reach the Earth. And in addition, this number also means that the sun that we see above the earth is not"Now"The sun, but the sun 8 minutes and 20 seconds ago!

Therefore, if the aliens break the sun, we who live on the earth and lie on the beach to bask in the sun can still enjoy the sun's rays for 8 minutes and 20 seconds, only to find that the sun has disappeared.

How long does it take for the sun to reach the Earth's light? Seconds or minutes or hours? Far more than that.

The sun's light is not emitted from the surface, but from the photons produced by nuclear fusion inside the sun. If the light produced by the inner center of the sun reaches the earth, I say it will take about 5 million years, is there any rebuttal? If you don't understand, you can make up for "Brownian motion" and then study Einstein's explanation of the relevant ones, saying that 8 minutes are all at the level of elementary school students.

It takes 8 minutes and 13 seconds for sunlight to travel to Earth.

In fact, it takes 50 million years, the speed of light is 299,792,458 meters and seconds, and the average distance between the sun and the earth is 100 million kilometers.

The distance between the Sun and the Earth is one less zero.

s。You? There are a lot of issues that these young women should be concerned about.

Why is the sun's rays visible immediately after a total solar eclipse? Isn't it 8 minutes for sunlight to reach the earth?

We know. The distance between the Sun and the Earth is in fact quite long.

up to 150 million kilometers. Watch the sun shine on the earth every day.

Would you have thought of it.

The rays emitted by the sun.

How long does it take to travel in space.

Will it reach Earth? The speed of light is about 300,000 kilometers per second.

Therefore, we can use the kinematic formula learned in the country to calculate the time it takes for sunlight to travel from the sun to the earth. Formula: t=s v so we get 15000000km (300000km s)=500 seconds 8 minutes and 20 seconds from the above calculations.

It takes us 8 minutes and 20 seconds to get the light.

to be able to reach the earth. Other than that.

This number also means something else.

That is, the sun we see above the earth is not"Now"of the sun.

It's the sun 8 minutes and 20 seconds ago! Therefore.

If the aliens break the sun.

Live on Earth. We lying on the beach basking in the sun.

You can also enjoy 8 minutes and 20 seconds of sunlight.

Only then will you find that the sun has disappeared.

Reference: About 8 and a half minutes.

Does the Earth Really Shine? What does this have to do with its place in the universe?

Hello. The Earth actually emits light, but its glow is not produced by itself, but by its position in the universe. In fact, the Earth is a celestial body that collects and reflects light from the universe, and the light it reflects back is the light we see emitted from the Earth.

The light emitted by the Earth is determined by its position in the universe, for example, its distance from the Sun, its distance from other planets, and its distance from other cosmic matter. When the Earth is closer to the Sun, it reflects brighter light, which is why we see the Sun shining on the Earth. On the other hand, when the Earth is farther away from the Sun, the light it reflects back will be dimmer, which is why we see the Moon shining on the Earth.

Thus, the Earth does emit light, but the intensity of its luminescence depends on its position in the universe.