Complex sentence: Einstein's special relativity is supporting the wave theory of light that originates from the observation of water waves that analogy is applied to sound that is formed by invisable waves formed by the motion of a medium (air), composed of matter.
Split into simpler sentences: Einstein's special relativity is supporting the wave theory of light that originates from the observation of water waves. The water wave analogy is applied to sound that is formed by invisable waves formed by the motion of a medium (air), composed of matter.