I Restoring S.I. units to a Lagrangian in natural units

  • I
  • Thread starter Thread starter Precious Adegbite
  • Start date Start date
  • Tags Tags
    Lagrangian
AI Thread Summary
Restoring S.I. units to a Lagrangian in natural units involves understanding which quantities were excluded for simplification. The discussion clarifies that fundamental quantities are not omitted but rather quantities that relate different dimensions are. To restore S.I. units, one can either reintroduce the excluded quantities or apply specific scaling factors that align with the dimensions of the Lagrangian density. The choice between these methods depends on the context of the field being analyzed. Ultimately, the approach taken should ensure dimensional consistency in the Lagrangian formulation.
Precious Adegbite
Messages
6
Reaction score
4
TL;DR Summary
Restoring the Lagrangian units
If we have a natural unit Lagrangian, where some fundamental quantities have been excluded to ease calculations...and aim to restore it's S.I units back, do we just have to plug back the fundamental quantities that were initially excluded Into the Lagrangian...or we use some specific scaling factors corresponding to that field that has the same S.I units of Lagrangian density, and scale the unitless Lagrangian with it.
 
Physics news on Phys.org
"fundamental quantities" are not excluded in using natural units.
Only quantities relating two different dimensions are excluded.
 

Thread 'The Physics of unloading sand from a barge'

I think it's easist first to watch a short vidio clip I find these videos very relaxing to watch .. I got to thinking is this being done in the most efficient way? The sand has to be suspended in the water to move it to the outlet ... The faster the water , the more turbulance and the sand stays suspended, so it seems to me the rule of thumb is the hose be aimed towards the outlet at all times .. Many times the workers hit the sand directly which will greatly reduce the water...
View full post »

Similar threads

I Confused about unit conversion involving natural units
Replies
2
Views
2K
I How do we justify "Natural" Units
Replies
9
Views
3K
I Is there a way in Lagrangian mechanics to incorporate the inertial response from initial momentum when using initial conditions instead of BCs?
Replies
9
Views
915
I Are Planck Units Merely a Pop-Science Fad?
Replies
2
Views
2K
B Manipulating quantities with natural units
Replies
2
Views
4K
I Lagrangian Paradox: Uncovering an Issue
Replies
15
Views
2K
I How to Change Between Unit Systems w/ ##c \ne 1, \hbar \ne 1, G \ne 1##
Replies
4
Views
1K
I Checking if a stationary point is a minimum using Lagrangian Mechanics
Replies
1
Views
2K
I The new definition of kg and the mass-energy equivalence
Replies
4
Views
4K
B Why Do We Treat Units Like Variables in Physics?
Replies
10
Views
2K

Hot Threads

Recent Insights

Back
Top