Distance between two points of differing phase

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SUMMARY

The discussion centers on calculating the minimum distance between two points on a wave with a wavelength of 20 cm that differ in phase by 60 degrees. The correct calculation involves understanding the relationship between wavelength, phase difference, and distance. The participant expressed confusion regarding the concept of phase and ultimately guessed a distance of 3.33 cm, which is incorrect. To accurately determine the distance, one must apply the formula: distance = (phase difference / 360 degrees) * wavelength.

PREREQUISITES
  • Understanding of wave properties, specifically wavelength and phase
  • Basic trigonometry to interpret sine waves
  • Familiarity with wave phenomena and their mathematical representations
  • Ability to read and interpret diagrams related to wave phases
NEXT STEPS
  • Review the mathematical relationship between wavelength and phase difference
  • Learn about wave phase and its implications in physics
  • Study the concept of sine waves and their graphical representations
  • Explore resources on wave phenomena, including online articles and textbooks
USEFUL FOR

Students studying physics, particularly those focusing on wave mechanics, as well as educators seeking to clarify concepts related to wave phase and distance calculations.

AdamNailor
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1. A wave has a wavelength of 20 cm. Calculate the minimum distance between 2 points on the wave which differ in phase by 60 degrees



2. ummmm



3. I have drawn a sine wave from 0 to 360, and have marked the point where 60 degress should be. I don't really know why though. Very stuck, even though it seems like an easy short question. Missing something here for sure.
 
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Is it 3.33?

I need to learn the simple definition of what phase is I think.

EDIT: Doesn't matter, I've had to hand it in now. Just guessed at 3.33. Which is probably wrong, but it was only two marks so its not the end of the world.
 
Last edited:
Hopefully you showed your reasoning in determining your answer. A guess
often earns: 0 credit, or if your teacher is generous: 1/4 credit.

To gain a better feel for phase you may want to review your book's definition and look particularly at any associated diagrams. A search of the internet on phase as it relates to wave phenomena will also give you insight. Here's one http://en.wikipedia.org/wiki/Phase_(waves)" .
 
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