Our physics teacher showed us this video today to explain what the Doppler effect is.

Our physics teacher showed us this video today to explain what the Doppler effect is.

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  1. The Doppler effect (or the Dopplershift) is the change in frequency or wavelength of a wave for an observer who is moving relative to the wave source. It is named after the Austrian physicist Christian Doppler, who described the phenomenon in 1842.

  2. Playing lower notes as you slowly ski past the camera doesn’t illustrate the Doppler Effect very well. Although I will admit you can hear the shift right after he starts playing lower notes.

  3. Our 8th grade science teacher demonstrated this by driving his minivan around the track while honking his car horn. All the teachers who’s classrooms were adjacent to the said track hated him for the rest of the week.

  4. Isn’t it forbidden in ski resort to play loud music, scream, …? The problem is not on the ski slope. It is the marke-off area where ~~lawines~~ avalanches can happen.
    Or mini-~~lawines~~ avalanches from snow on rooftops. A small child could get stuck, etc.

    The ski resort owner want to cause ~~lawines~~ avalanches in a controlled matter so there are no unexpected accidents. (Clearing snow from roof, so the roof does not collapse under the weight. Removing excess snow on the resort so a ~~lawine~~ avalanche cannot happen uncontrollably.)

    edit: thought lawine was an english word. It is not.

  5. Story time! Back in highschool, me and my gaggle of friends were walking along down town. A group we considered our rivals cruised past in a car, one of them yells as they go by


    We are all slightly confused, we look to our large friend who shrugs.

    “I think they just called us faggots… That my friends, is the Doppler effect.” He says

    And that is the day I learned of the Doppler effect outside of school, and made it much easier to grasp once we got to learning about it in class.

  6. Our teacher got us out of the clasroom and we went into the football field. We were there playing a game. One of us would run towards the group with a speaker that was playing music and then run past the group.

    We all understood it.

    Then our teacher said to all be quiet and gather around so we did, and a fire truck was heard racing down the street and it basically illustrated the same thing. And we all went ahh!.

    Then a motocycle was heard and we were still all gathered around so we listened to that and it becase really obvious what this thing that we had all experienced before was.

    And that was that. I will always remember it because we went outside running and we all wanted to take turns running around. To this day as I’m at a light or whenever and I heard a police car, fire truck, ambulance, loud motocycle, whatever, I always remember that class, that teacher, my classmated and the doppler effect.

  7. 1. I think this would be considered a ‘demonstration’ of what the Doppler effect is, not an ‘explanation.’

    2. This isn’t even a demonstration of the Doppler effect, it’s just someone playing lower notes. So it’s probably more confusing to students (who probably aren’t already familiar with the Doppler effect since they’re being taught about it). The Doppler effect is the shift in frequency due to the relative movement of the source and observer. This shift is due to the source actually changing the frequency of the notes that are played.

    3. If you’re “24 yrs old, $200k/yr with $1M in the bank,” why are you only just now learning High School-level Physics concepts?


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