You need to know about these quantities used in waves - what they mean, the symbols used for them and the units used to measure them. The amplitude (\(a\)) of a wave is the distance from the ...

For instance, when light travels from air to glass or water waves travel from deep to shallow water. FAST is a useful way of remembering the speed and direction changes of waves during refraction ...

As an airplane flies faster than the speed of sound, it "pushes" on the sound waves in front of it. But sound waves obey the speed limit—they can't travel faster than the speed of sound.

9. Explain to students that seismic waves travel fast, on the order of kilometers per second. The speed of a seismic wave depends on many factors. Ask students to think about a few factors that ...

San Francisco launches its first speed enforcement cameras, targeting vehicles exceeding speed limits by 11 mph or more.