Projects by Woody

相对论诠释(动画)

吴笛:大家好,我制作了一段诠释爱因斯坦相对论的简短动画。这只是关键帧版本,不是完整版本。请给我一些建议,告诉我哪些部分需要改进。谢谢!

备注:吴笛正在为BJC准备视频,以上是他在Schoolhouse的留言(译文)。

内容概述(译文)——

时空——一个辽阔而神秘的维度,将空间和时间视为相互连接、不可分割的,形成了四维连续体,构成我们观察、体验和互动的一切。太空时间非常复杂,我们只是触及了表面,但我们可以向我们的老朋友爱因斯坦,学到很多关于它的知识——你可能知道他是制定了等式 E=mc² 的著名科学家。

20世纪初,爱因斯坦开始进行宇宙的革命性探索,他的旅程始于相对论的特殊理论。特殊相对论基本上意味着像你我这样的观察者,不会以加速度观察其他事物。在1905年发表了相对论特殊理论的10年后,爱因斯坦发展出一种新理论,称为广义相对论。这是一个更全面的理论,包括引力。关键的洞察是引力不是像牛顿所描述的力,而是由质量引起的太空时间结构中的曲率。简单地说,质量告诉太空时间如何弯曲,太空时间告诉质量如何移动。

我还没有涉及更深入的内容,比如黑洞和时间膨胀,我们对太空时间的了解还有很多不足。但我知道的是,我们正在逐渐理解太空和时间。

版本一:时空

脚本 | Scripts

Scripts:

0:00
Space time.

0:01
Such a vast and mysterious dimension, it treats space and time as interconnected and inseparable, creating four dimensional continuum, which makes up everything we observed experience and interact.

0:15
Spacetime is very complex and we barely scratch the surface, but we can learn a lot about it with our good old friend O Briste.

0:24
You might have known him as the famous scientist who formulated the equation E equals MC squared.

0:30
Well, in the early 20th century, he embarked on the revolutionary exploration of the universe where his journey begins with the special theory of relativity.

0:40
Special relativity basically means observer like you and I which are not speeding up or down to observe something else.

0:47
Let’s say this if I were to ride a bike and that I’m traveling at a very high speed while there’s another person standing still on a platform, we both will measure the speed of light as the same constant value even though our motion is very different.

0:59
By the way, he’s Bob.

1:01
And let’s say I’m going to zoom past Bob Lorette.

1:04
At that time, two lasers strike at the two sides of me and Bob for Bob, the two lasers seems to strike at the same time.

1:12
But for me who is riding on a bike, I would see the laser in front of me first and then see the laser behind of me.

1:19
This is just a small example of what special theory of relativity have after Einstein published it in 1905.

1:25
10 years later, Einstein developed a new theory called this general theory of relativity, which is a more comprehensive theory that includes gravity.

1:33
The key insight is that gravity isn’t a force as new described but rather a curvature in the fabric of space time caused by mass.

1:40
Simply to say that mass tells space time how to curve.

1:43
Space time tells mass how to move.

1:46
There’s still a lot, I haven’t covered like black holes and time dilation and we still didn’t know a lot about space time yet.

1:54
But what I do know is we’re understanding space time.

1:57
Little by little.

1:58
Thanks for watching.

版本二:光速

脚本 | Scripts

0:00
We’ve all heard of Albert Einstein’s special theory of relativity, right?

0:03
It delves into the speed of light and its fascinating properties.

0:07
But let’s take a step back and ponder a fundamental question, what exactly is light you might think?

0:14
Well, it’s the stuff to make us see things and you’ll be correct.

0:18
But let’s dive deeper into why light have to be constant for all observers and find a way to visualize it.

0:24
Einstein, the genius behind the iconic equation E equals MC squared raises an intriguing point.

0:31
If light weren’t constant, it could accelerate decelerate and even be a different speed leading to confusion in our observation.

0:38
And more, for instance, if we look at the direction of the same object, let’s say a cube, you will probably saw the cube first before I did.

0:45
Other than that, we both might even saw the cube blinking since light isn’t constant, every single photon will have a different speed to reach our eyes, which makes us think the cube is blinking.

0:55
By the way, life can travel at an astonishing 299,792 kilometers per second in a vacuum, which is like completing about 7.5 laps around the earth at the equator in just one second.

1:08
Now, that’s the speed we’re talking about to illustrate.

1:12
Let’s envision a scenario.

1:14
Imagine I’m riding a bike moving nearly at the speed of light.

1:17
Don’t ask me how as I zoom past Neon, who is standing still with two lasers on his sides, I’ll see the front laser before the back one resulting of my high speed and lights constant velocity.

1:28
For neon who is standing still, both lasers appear simultaneously due to the vast difference in our motions.

1:35
You might wonder what if neon is closer to one of the lasers?

1:40
Well, I say the incredible speed of light makes the difference barely noticeable.

1:44
Even if neon shift closer to a laser, I moving at nearly the speed of light still perceive the front laser before the other.

1:51
And there you have it a brief exploration into why light is constant and a glimpse of how to visualize its astonishing speed.

1:58
Thanks for watching.


关于BJC——

BJC少年突破挑战

少年突破性挑战赛(Breakthrough Junior Challenge),简称BJC,是一项年度全球竞赛,旨在激发学生对科学的创造性思考。来自全球各国的13至18岁学生被邀请创作并提交最长2分钟的原创视频(之前为3分钟),这些视频将生命科学、物理学或数学中的概念或理论赋予生命。提交的内容将根据学生以引人入胜、富有启发性和富有想象力的方式传达复杂科学思想的能力来判断。挑战赛由超越奖基金会组织。

探索全宇宙和全人类的未来—仰赖于热爱科学的年轻人。如果你是这样的年轻人,并且年龄在13至18岁之间,你可以把你在科学或者数学方面的点子制作成一个时长三分钟的小影片,以此来报名参与青年突破奖挑战大赛。 ——史蒂芬·霍金(微博链接)