Wave Period and Frequency

104 - Wave Period and Frequency
In this video Paul Andersen explains how the period is the time between wave and the frequency is the number of waves per second. Period is measured in seconds and frequency is measured in Hertz. Wave period and wave frequency are reciprocals of one another. After watching this video you will be able to determine the period (and therefore the frequency) using a position vs. time graph of a wave.
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Music Attribution
Title: String Theory
Artist: Herman Jolly
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All of the images are licensed under creative commons and public domain licensing:
igjav, Ignacio javier. English: A Simple Red Lamp, Modern Look, July 27, 2011. Own work. commons.wikimedia.org/wiki/Fil....
---. Italiano: Icona Di Una Lampadina Spenta Realizzata in Svg, June 2, 2012. File:Bombilla amarilla - yellow Edison lamp.svg. commons.wikimedia.org/wiki/Fil....
“Wave on a String.” PhET. Accessed April 13, 2015. phet.colorado.edu/en/simulatio....

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Hi, just wanted to say thanks for this very clear explanation, it has really helped me to grasp the basics of the relationship between wave period and freq, I hadn't seen your previous videos but will deffo be checking them out to see if there's any other topics I need to understand better for my coursework. Especially if you have any Algebra vids. I was doing fine with Mathematics until the alphabet got involved...
I am studying towards a degree in Computing and IT with Open University (studying from home with lectures online). I have no school qualifications, but I'm doing OK so far. One of the compulsory modules of the degree is to choose between 'Discovering Mathematics' and 'Essential Mathematics', essential mathematics is a follow up to A-level students here in UK and was way too advanced for me so I started Discovering Mathematics - I wasn't prepared for mathematics to be such an important part of the computing course before hand so have been thrown in at the deep end before I can swim in regards to the mathematics side of things.
Anyway I have been doing alright, but one of my assignment questions has asked something like: to calculate the period of a Sine wave when given the frequency, and to then half the result (period) and explain/calculate what then happens to the frequency.
Your video gave me a clear insight and cool visual explanation of it all with the light bulbs and really helped so want to say a big Thank You!

[@alexandarbezanovski5192]

Thank you so much for explaining this with videos of waves to see what it physically is, it makes much more sense!

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What you did in 4.89 minutes (approx.) is what takes a period of 4 days. Awesome explanation sir👍👍👍👍👍👍👍👍👍👍

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couldn't be easier than this video to learn about frequencies. Thank you

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The final is tomorrow, so thank you. my teacher just sort of stopped teaching

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you have literally saved my life. I have an exam tomorrow and I dint understand the relation between period and frequency.thank you for helping me understand this concept.

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Will you explain Fourier transform or any simillar subject from "difficult physics"?

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Thank you so much! I just could not grasp this the way my teacher was teaching us. The flashing light bulb really helped.

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super cool and helpful so wait is this for all waves? does it apply to sound as well as light? or are there other rules for sound waves ?

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thank you for making me understand this in 5 minutes while my teacher couldn't even teach me this in 3 days.

[@gregorynicholls9991]

Thanks ,Another important part that I wanted to know is which is more powerful,a short wave or a long wave,and does length affect the speed? Are there any good applications for the slower, weaker wavelength,whichever that one might be?

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So on successive waves i can use the trough on one wave and the trough on the next wave to calculate the period ?

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[@HannahHudge]

if the period of a tone is in milliseconds, is it still 1 divided by that number? In other words, is it always 1 divided by the period or is T in seconds?

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What exactly is period of a sine wave? When we describe it on an axsis, will the period be 2pi Second or 2pi Radian?

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Nice and simple, thanks! Reviewing for Fourier analysis course.
Sometimes you forget the little things :-D

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Agreed. One thing is just the rule, (Simple! it's just the inverse!), but you have to keep what that does clearly in your mind to grok when you need it in context. Otherwise it's a useless rule you can't implement, or it becomes just a "trick" when you use it in equations. Regards.

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thank you!

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so a period is the time in between waves right? Or is it the time taken for a full oscillation?

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Did anyone else's head explode at the end?

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