In thwe pictreua

Gam radio signals can usually be heard behind a hill, but fm often cannot. that is, am signals bend more than fm. explain. (radio signals, as we shall see, are carried by electromagnetic waves whose wavelength for am is typically 200 to 600 m and for fm about 3 m.)

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?

What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?