magnet

[huangchong]

[huangchong]

linear accelerator

[iMaJia]

磁場有沒有速度？如果排一列很長的磁鐵能不能超光速傳遞信號

[huangchong]

磁場有沒有速度？如果排一列很長的磁鐵能不能超光速傳遞信號

磁场的速度就是电磁波的速度 磁场的变化必然产生电场 于是产生电磁波

[iMaJia]

磁场的速度就是电磁波的速度 磁场的变化必然产生电场 于是产生电磁波

哦

引力呢，有沒有速度？

而且引力是不是不受阻擋，沒有東西能隔離引力？

[huangchong]

哦

引力呢，有沒有速度？

而且引力是不是不受阻擋，沒有東西能隔離引力？

引力就是引力波吧 据说也是真空光速 真空光速就是这个宇宙的信息速度

[huangchong]

引力就是引力波吧 据说也是真空光速 真空光速就是这个宇宙的信息速度

这里有个动画 黑洞相撞

https://en.m.wikipedia.org/wiki/Gravitational_wave

[huangchong]

网上说 没有什么可以阻挡引力波

Gravitational waves can penetrate regions of space that electromagnetic waves cannot. They allow the observation of the merger of black holes and possibly other exotic objects in the distant Universe.

[huangchong]

但是黑洞呢

https://www.forbes.com/sites/startswith ... 73c21423dd

Nothing ever seems to stop gravitational waves, with the only alterations we see coming from the effects of distorted spacetime due to the presence of masses and the expanding Universe. But on the other side of the coin, we have black holes, which have an event horizon: a region from within which nothing can escape

[fhnan]

但是黑洞呢

https://www.forbes.com/sites/startswith ... 73c21423dd

Nothing ever seems to stop gravitational waves, with the only alterations we see coming from the effects of distorted spacetime due to the presence of masses and the expanding Universe. But on the other side of the coin, we have black holes, which have an event horizon: a region from within which nothing can escape

黑洞怎么让引力给逃出来了？
看起来引力不是力。

[iMaJia]

那只有量子糾纏和蟲洞能超過光速傳遞信息了