Do you know that the Sun Sail works

The second is wrong. Due to the conservation of momentum, a portion of the photon's momentum is lost (transferred to the solar sail) after it hits the solar sail, so it can be calculated from Planck's formula that the wavelength of the photon becomes slightly longer. That is, there will be a very small redshift in the wavelength of the reflected light.

Therefore, the energies of the incident light and the reflected light are not consistent. The conservation of energy should be in the entire system including the entire solar sail.

In addition, the role of the solar sail has been experimentally confirmed, which does not need to be discussed further.

It should be said that both have their own reasons.

According to the impulse, when a large amount of light collides with a sail, like a moving object colliding with a stationary object, we feel that it is too small and a little neglected, but it is not.

According to the conservation of energy, the speed of light is great. Although the quality is small, its role cannot be ignored.

But I think the first one is a little bit better.

Not paradoxically, due to the Doppler effect, when the sunlight is reflected back by the receding solar sail, the frequency decreases, whereas according to e=hv, the energy carried by the photons decreases and becomes the kinetic energy of the solar sail, and the total energy is conserved.

It can be used.

In 05, the United States had already launched an experimental artificial satellite, spreading the sails of the sun in space.

The first view is based on the particle hypothesis of light, which holds that photons have mass just like ordinary particles in our world (according to the principle of relativity, the rest mass of a photon is zero, but its dynamic mass is not). Therefore, when the light shines on the light sail, it will generate thrust like ordinary particles colliding on the light sail, thus creating light pressure.

The second view is of universal significance, and the conservation of energy can be considered to be true at all times and everywhere within the scope of existing knowledge. In fact, as long as the area of the sail is large enough, it can accept the kinetic energy of almost countless photons to make the sail move.

Explanation 3: In fact, we can use the knowledge of high school to explain how light produces light pressure on the light sail: light is an electromagnetic wave, and the electrons produce the Lorentz force under the action of electromagnetic waves, and the light sail should be caused by some crystals, and the crystal has good symmetry and uniformity, when the light shines on the crystal plate, the Lorentz force generated is basically in the same direction, and the Lorentz force that cancels each other should be just a decimal.

In this way, there should be no problem with the solar sail made of crystals, propelled forward by Lorentz under the illumination of light. (The third explanation is that I have some inspiration for some of the knowledge I have learned, and I have not seen other sources to confirm this explanation, so it may not be accurate.) ）

Watch the "Wonder Kid in **" series, the classmates in the class like a Hollywood blockbuster sci-fi scene, heroism, and full of positive energy, are waiting for the author to release a sequel.

Hard sci-fi is mostly not good, He Xi's is not bad, soft sci-fi, "The Visitor in a Billion Years", "Light Brain", "Six Beings of the Path" are all good.

Da Liu's "The Wandering Earth", "Earth Fire", and "Earth Cannon" are all good, which is more suitable for you to watch.

The two books "Blue Blood" and "Castle in the Sky" are both good, and they are very suitable.

No one knows what the future will look like and what kind of life they will live, so they can only live in the present and take each day seriously;

What does someone say, will cross,,du is like zhi in the movie science fiction film,,All kinds of different daos

Thinking about the sky, I think it's impossible, but it's a reversal.

Yes, to put it this way, human beings are slowly progressing, think about computers, mobile phones, networks, etc., human beings have all made them, what is impossible, no matter what the future looks like, I will die in a few decades, I can't see it, I hope that I will have a next life, no one knows what the future will be like Human beings are still evolving, our bodies and brains are not the same as our ancestors, and our descendants will be different from us. It is thought that modern Homo sapiens did not evolve much after the Pleistocene, but new research on genetic information from populations around the world has found that the rate of human evolution has accelerated after the development of agriculture and cities. If we continue to evolve, what will humanity look like in a thousand years, after experiencing unexpected environmental and social developments?

Speculative answers range from hopeful to hateful nightmares.

The development of people in the future is different, it is unimaginable, but we can control it with our best efforts.

The future is something that no one can**, but life is always good.

You have to ask yourself, the future can be envisioned, so no one can predict what the future will look like, but you can work hard to make the future what you want it to be.

Work hard, and the future will be good.

The future is unimaginable and very good.

Just look in the mirror.

The future is long and promising, and the appearance is good.

I don't dare to say that it may give birth to other species.

E-commerce. Youhe.com.

Jack Ma said that the future will either be e-commerce or no business.

The future of man or the future of the planet or whatever?

As long as you work hard, the future is very bright.

The future cannot be 100%**, maybe the future is 1+1=2, what do you want the future to look like, what the future is like, the future is determined by human beings, everyone is the creator of the future.

The future is like a picture ...... the futureYou have to draw whatever you want.

Your future depends on your efforts now and your aspirations....Move towards your goal and you will succeed.

Then you have to find out for yourself!!

The overall shape of the flagship mother of the CV is designed as a reference for a typical warship in the Middle Ages, and the golden goddess statue under the bow is a symbol of the authoritative representative of the Rona family. But this ship can be regarded as a combination of the advanced technology of the warships of that time. In addition to several MEGA ion cannons mounted on the "mast", the bow of the ship, the hull and the stern are equipped with a ring device that generates a beam shield, and when the defense is activated, it is worth mentioning that the ship's beam flag, in addition to the role of navigation and demonstration on behalf of the vanguard of death, also has the function of a solar sail, using the solar wind to accelerate the speed of the battleship.

The flagship of the anti-Saturn Empire, led by Bella Rona and Sibuk.

Mother Vanguard, the mother ship of the Pirate ArmyThe one above is in its normal state, and the one below is in the manga version with the beam sail open.