4 ms·
"The kilogram is the mass of a body at rest whose equivalent energy equals the energy of a collection of photons whose frequencies sum to [1.356392489652×10^50]
by Willson50 7y ago
"The kilogram is the mass of a body at rest whose equivalent energy equals the energy of a collection of photons whose frequencies sum to [1.356392489652×10^50] hertz."
- effie 7y agoGlad that is a deprecated formulation. One never has collection of photons of exact frequency of net mass 1kg. Also 1kg weight can't be realistically entirely turned into photons.
- saagarjha 7y agoYour sarcasm was a bit hard to distinguish ;)
- effie 7y agoThere wasn't any sarcasm intended.
- deleted 7y ago[deleted]
- marcosdumay 7y agoIsn't the new definition completely equivalent with the GP's one?