That’s pretty much all you need for instruments to determine Planck’s constant to a decent degree of precision, the way that [poblocki1982]’s did. There’s a little more to it, of course ...

The wavelength emitted is a function of the energy times a constant (h), now known as Planck's constant. Though Planck's idea was not immediately believed by most physicists, it is now accepted as ...

"The date, April 14th, represents the first three digits of Planck's constant, which describes the relationship between the energy and frequency of a quantum of energy (such as a photon): 4.14×10 ...