The energy of any wave is the frequency multiplied by Planck's constant.

Atomic unit systems are based (in part) on the Planck's constant.

That minimum amount of energy has the Planck constant as one of its factors.

With the reduction in Planck's constant we can go further.

This h is a number called Planck's constant after its discoverer.

How do you know there is any connection between Planck's constant and the speed of light?

Little things like the charge on the electron, Planck's constant.

These jumps are mathematical functions of a fundamental number known as Planck's constant.

That is, however, not possible since Planck's constant really defines what we mean by "small"; you cannot have smaller molecules.

For another somewhat opaque example, h is always Planck's constant.