yes it is true for all waves.
This is called the Doppler effect. Because air is compressible, that causes sound waves to lengthen the further you get from the source. This is also how radar speed detection works. The device calculates the rate of the Doppler shift to determine the speed of the car or other object being measured.
Vibration from sound waves
Yes. This is called a blue shift, and is caused by shortening of the period of waves. It's inverse is a red shift, which occurs when the observer is moving further away from the source of sound. These are both examples of Doppler Shifts.
Doppler |ˈdäplər|Doppler, Johann Christian (1803-53), Austrian physicist. In 1842, he discovered what is now known as the Doppler effect. Doppler effectnoun Physicsan increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move toward (or away from) each other. The effect causes the sudden change in pitch noticeable in a passing siren, as well as the redshift seen by astronomers.
Refraction occurs for any waves, where there's a change in the medium.
The Doppler effect proves that sound travels in waves.
No. We observe the Doppler Effect in all forms of waves, including sound waves and all forms of electromagnetic radiation.
Sound Waves.
The Doppler effect is most noticed when it comes to three types of waves. They are water waves, sound waves and light waves.
I fear you're confused - BUT : The Doppler effect is similar for both sound waves and electromagnetic radiation (light, radar).
The Doppler effect is a phenomenon observed whenever the source of waves is moving with respect to an observer. The Doppler effect can be described as the effect produced by a moving source of waves in which there is an apparent upward shift in frequency for the observer and the source are approaching and an apparent downward shift in frequency when the observer and the source is receding. The Doppler effect can be observed to occur with all types of waves - most notably water waves, sound waves, and light waves.
Nope. Has nothing to do with it!
When the train gets close to you the sound wave are compressed making a higher pitch noise and as the train passes the sound waves become lengthened. That is the doppler effect in a nutshell. Now just compare it to how the doppler effect changes light waves.
Doppler effect
A change in pitch.
This is due to the Doppler Effect. The Doppler Effect explains how a source of sound, in this case the siren, is catching up with the sound waves it emits. The space between waves is consequently shorter. This produces a higher frequency sound. As the source passes you, it is speeding away from the sound waves. The waves are spread further apart, thus producing a lower frequency.
There are changes in the frequency of the sound waves caused by the motion of the car, which demonstrates the Doppler Effect.