Which statement describes a light wave passing through space? A. Vibrations of the electric field are parallel to vibrations of the magnetic field.
B. Vibrations of the light source are perpendicular to the direction that the wave travels.
C. Vibrations of the electric field are perpendicular to vibrations of the magnetic field.
D. Vibrations of the electric field are parallel to the direction that the wave travels.

Atrain is traveling at 30.0 m/s relative to the ground in still air. the frequency of the note emitted by the train whistle is 262 hz. the speed of sound in air should be taken as 344 m/s. what frequency (f approach) is heard by a passenger on a train moving at a speed of 18.0 m/s relative to the ground in a direction opposite to the first train and approaching it? what frequency (f recede) is heard by a passenger on a train moving at a speed of 18.0 m/s relative to the ground in a direction opposite to the first train and receding from it?