Distance between two points of differing phase

[AdamNailor]

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.

 

[AdamNailor]

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.

 

[Ouabache]

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)" .