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## Summary:

- The maximum speed in therory

Hello!

My kid asks if this is theoretical idea is correct and I just don't know this stuff very well:

It is impossible to travel at light speed but not impossible to travel just below. So the highest theoretical speed should be:

"

I ask: How about "

He didn't like that because he think that a Planck length is the smallest thing and cannot be divided. How should we think about this?

My kid asks if this is theoretical idea is correct and I just don't know this stuff very well:

It is impossible to travel at light speed but not impossible to travel just below. So the highest theoretical speed should be:

"

**The distance light has traveled in one second**" minus "**One Planck length**"I ask: How about "

**The distance light has traveled in on hour**" minus "**One Planck length**", isn't that closer to the speed of light?He didn't like that because he think that a Planck length is the smallest thing and cannot be divided. How should we think about this?