Recent content by Huangdongcheng

This is the problem I encountered when studying physics. Then I presented the problem for discussion!

Have you really thought about these questions seriously? Suppose the elder brother left the Earth at 8:00 on January 1, 2015, when they were both 20 years old. When he returned to Earth, his clock showed 8:00 on January 1, 2020, and he looked like a 25-year-old. While the younger brother's clock...

In reality, do you think that what happens in time has no connection with what occurs in the universe? Do you think that exactly the same events could take place in different times within the universe?

It seems that you haven't realized the complexity of this issue. Some problems can be solved using mathematics, but some cannot be simply addressed by mathematics alone. For instance, whether the calculated results are consistent with reality. Suppose the elder brother left the Earth at 8:00 on...

It seems that you haven't realized the complexity of this issue. Some problems can be solved using mathematics, but some cannot be simply addressed by mathematics alone. For instance, whether the calculated results are consistent with reality.

You solve this problem using mathematics: If a pair of twins were 20 years old at 8:00 on January 1, 2015. Then the elder brother went on a space journey and returned to Earth, and his clock showed 8:00 on January 1, 2020. So did he witness the events that happened on January 1, 2020 on Earth or...

Perhaps I really don't understand relativity, but that doesn't mean we can't question and doubt authoritative theories. Aristotle's ideas persisted for over two thousand years, and eventually they were rejected.

Why choose the Sun as the reference frame? The solar system is also in motion within the Milky Way. Is it reasonable to choose the Sun as the reference frame? What if the spacecraft is moving far away from the solar system? Then what should be chosen as the reference object to measure the speed...

Does the original version of the twin paradox only allow for linear motion? Doesn't the formula break down when an object moves on a curved path? No matter how complex a formula is, if it doesn't fit real life, it's useless.

Before a spacecraft leaves Earth, can we compare the speeds of two clocks? After the Earth completes one orbit around the Sun and the spacecraft returns to Earth, can we compare the speeds of the two clocks? Which clock would be slower, according to your calculations? Furthermore, if there are...

According to the theory of relativity or the Lorentz transformation formula, time passes more slowly for a moving object than for a stationary one, and the faster the object moves, the slower time passes. So, is it wrong for me to ask whether the clock on the spaceship runs slower or the clock...

If there is a clock on the spaceship and a clock on the ground, you only need to give a definite answer as to whether the clock on the ground is slower or the clock on the spaceship is slower. Is it necessary to say so much?

When a spacecraft leaves the earth, its velocity is in the opposite direction of the earth's revolution around the sun. When the speed of the spacecraft relative to the earth is exactly equal to the linear speed of the earth's revolution, the spacecraft is stationary relative to the sun, and the...