# Yukawa-potential

03 Jul 2019can you construct a (non-relativistic) Lagrange-density \(\mathcal{L}(\Phi,\nabla\Phi)\) which leads to a field equation with a Yukawa-term, \(\left(\Delta + \lambda^2\right)\Phi = -4\pi G\rho\), and show that itâ€™s solved by the Yukawa potential \(\Phi \propto \exp(-\lambda r)/r\)?