Multipole radiation of a wave
I read that a sound wave (a scalar wave) produces monopole radiation, an electromagnetic wave (a vector wave) produces dipole radiation, and a gravitational wave (a second order tensor wave) produces quadrupole radiation. How do I make sense of multipole radiation physically? The Wikipedia article on multipole radiation is informative on the mathematics, but I can’t seem to get a physical picture.
Computer Tech Expert Answered question 27 Jun, 2023
Multipole radiation is a theoretical framework for the description of electromagnetic or gravitational radiation from time-dependent distributions of distant sources.
Computer Tech Expert Answered question 27 Jun, 2023