Difference between revisions of "Doppler Effect"
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: The '''Doppler effect''' can be noticed when cars pass by at high [[speed]]. At the cars are moving towards the [[observer]] the [[sound]] will be higher [[pitch]]ed but the moment the car goes past the [[sound]] will suddenly be lower [[pitch]]ed. | : The '''Doppler effect''' can be noticed when cars pass by at high [[speed]]. At the cars are moving towards the [[observer]] the [[sound]] will be higher [[pitch]]ed but the moment the car goes past the [[sound]] will suddenly be lower [[pitch]]ed. | ||
: The '''Doppler effect''' can be seen in the [[Visible Light|visible light]] [[emit]]ted by [[object]]s moving at extremely high [[speed]]. [[Light]] from [[object]]s moving away form the [[observer]] will appear to be longer [[wavelength]] and is referred to as [[Red Shift]]ted]] while [[light]] from [[object]]s moving towards the [[observer]] will appear to be shorter [[wavelength]] and is referred to as [[Blue Shift]]ted. | : The '''Doppler effect''' can be seen in the [[Visible Light|visible light]] [[emit]]ted by [[object]]s moving at extremely high [[speed]]. [[Light]] from [[object]]s moving away form the [[observer]] will appear to be longer [[wavelength]] and is referred to as [[Red Shift]]ted]] while [[light]] from [[object]]s moving towards the [[observer]] will appear to be shorter [[wavelength]] and is referred to as [[Blue Shift]]ted. | ||
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| + | {| class="wikitable" | ||
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| + | |[[File:DopplerEffect.png|center|400px]] | ||
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| + | | style="height:20px; width:200px; text-align:center;" |This image shows a red [[object]] moving to the left. | ||
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| + | An [[observer]] on the left of the [[object]] would experience higher [[frequency]] and shorter [[wavelength]] [[wave]]s | ||
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| + | An [[observer]] on the right of the [[object]] would experience lower [[frequency]] and longer [[wavelength]] [[wave]]s. | ||
| + | |} | ||
Revision as of 16:01, 13 March 2019
Key Stage 4
Meaning
The Doppler effect is the apparent change in frequency and wavelength of a wave when its source is moving relative to the observer.
About The Doppler Effect
- When the source and observer are moving away from one another the wavelength of the wave will appear to be stretched longer and the frequency will be lower.
- When the source and observer are moving towards one another the wavelength of the wave will appear squashed shorter and the frequency will be higher.
- The Doppler effect can be noticed when cars pass by at high speed. At the cars are moving towards the observer the sound will be higher pitched but the moment the car goes past the sound will suddenly be lower pitched.
- The Doppler effect can be seen in the visible light emitted by objects moving at extremely high speed. Light from objects moving away form the observer will appear to be longer wavelength and is referred to as Red Shiftted]] while light from objects moving towards the observer will appear to be shorter wavelength and is referred to as Blue Shiftted.
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| This image shows a red object moving to the left.
An observer on the left of the object would experience higher frequency and shorter wavelength waves An observer on the right of the object would experience lower frequency and longer wavelength waves. |