• travelling wave theory

प्रगामी:    moving non stationary prograssive progressive

प्रगामी तरंग:    advancing wave progressive wave progrressive wave

तरंग:    caprice fancy freak roller water wave maggot

तरंग सिद्धांत:    wave theory undulatory theory theory of waves

सिद्धांत:    doctrine principle Maxim rule motto outlines