system
Given the following post, respond as if you're commenting on Reddit:
human
Would a system of measurement based on the planck scales be a viable alternative to the metric system?

For example, all length would be measured by the planck length multiplied to powers of ten, and all time would be measured by planck seconds multiplied to powers of ten.

Also, what would the speed of light be in this system?
gpt
Whether it is a viable alternative depends on your application. For every day use, the Planck units would be horribly inefficient, because we'd have to use large powers of ten for essentially every single quantity. There's a reason that the units we use are the way they are (mostly): They're convenient.

However, for various branches of physics, the Planck units aren't just viable, they're the units of choice. And the reason why is connected to your second question:

> Also, what would the speed of light be in this system?

1

The Planck units are defined in such a way that a number of natural constants, including the speed of light, have value 1 when expressed in these units. This is rather convenient, because it means that equations can be simplified since these constants drop out in many places. This makes it much easier to see the structure of the formula and the relation between the various variables it expresses without as much clutter of constants.