Anonymous ID: 6837de Nov. 22, 2018, 10:03 p.m. No.4002206   ๐Ÿ—„๏ธ.is ๐Ÿ”—kun

>>4002165

no molecules.

Electromagnetic Waves.

longitudinal properties and transverse properties.

sound underwater creates 2 waves:

1st is almost instantaneous-longitudinal (pop knuckles heard other end of pool right away)

2nd is comparable to the ripples created on top of water working outward (transverse propogation)