I can ask myself now the question, how far does electromagnetic radiation, how far does light travel in the time of one period capital t?

现在我们能问，电磁辐射，有多远，光在一个周期T内，行进了多远？

youdao

I can ask myself now the question, how far does electromagnetic radiation, how far does light travel in the time of one period capital t?

现在我们能问，电磁辐射，有多远，光在一个周期T内，行进了多远？

youdao