2007-05-08 18:37:03 · 5 answers · asked by kjulcs 1 in Science & Mathematics ➔ Physics
The doppler effect is the lengthening or shortening of the wavelength of light or sound caused by the motion of the source relative to the observer.
Stars are (generally) moving away from us so the light gets shifted to a longer frequency. This is called red shift.
The pitch of a sound source on an object passing you is higher than if the source was stationary as it approaches and drops after it passes you. Pitch is related to wavelength.
2007-05-08 18:48:27 · answer #1 · answered by iansand 7 · 0⤊ 0⤋
A doppler is a device used to monitor fetal heart rate externally.
2007-05-09 01:45:24 · answer #2 · answered by sheila l 4 · 0⤊ 0⤋
Doppler is the name of effect. It's called Doppler's effect and it occurs when source of sound wave moving toward you or away from you and make voice become higher in pitch (toward) or lower in pitch (away)
2007-05-09 01:52:29 · answer #3 · answered by Weerapat P. 4 · 0⤊ 0⤋
It is a device to measure the speed of a train, a car on the road like a radar ,using sound wave frequencies changing by coming to device or going from the device heard.
2007-05-09 01:49:57 · answer #4 · answered by Tuncay U 6 · 0⤊ 0⤋
its that thing on your remote that you don't know what it does because the label for it rubbed off years ago.
2007-05-09 01:48:22 · answer #5 · answered by Robert M 2 · 0⤊ 0⤋