Standing Waves Introduction

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Reflection with and without inversion caused by fixed and free ends are demonstrated. Standing wave patterns at 5 different frequencies are demonstrated. A standing wave animation is shown to understand to how standing wave patterns are created. Nodes and antinodes are defined and demonstrated. Want Lecture Notes? www.flippingphysics.com/stand... This is an AP Physics 1 Topic.
Based on a suggestion from Dan Russell, I redid the "reflection with and without inversion" part. This is much better. Thanks Dan!
0:00 Reflection with inversion due to a fixed end
0:29 Reflection without inversion due to a free end
1:00 The demonstration at 15 Hz
1:37 Why the Liquid Crystal Display (LCD) is flashing
2:16 The demonstration at 30 Hz
3:21 The 15, 30, and 45 Hz demonstrations all together
4:12 “Plucking” the string to visualize the wave pulses
4:40 The standing wave animation
7:39 Defining nodes and antinodes using the animation
8:15 Identifying nodes and antinodes in the demonstrations
9:36 Standing wave patterns only work at certain wavelengths
Next Video: Determining the Speed of a Standing Wave - Demonstration
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Thank you to Kristie Webb for transcribing the English subtitles of this video.
#StandingWaves #Transverse #Reflection #Inversion #Node #Antinode

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Note to self: - at 5:30: "Neither of those waves exists *by themselves*" - that doesn't mean those waves don't exist, it just means that they can't be observed as waves going forward or backward, they can only be observed as standing waves. - this is because, when the wave generator is set at high enough frequency (i.e. such that there is the opportunity for forward travelling waves to interfere with backward travelling waves), every point in the forward travelling wave and backward travelling wave will add up either constructively or destructively.

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