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May 22, 2020 at 13:01 comment added Lucas Tan @BioPhysicist thank you for sharing that post! For some reason when I tried to find my question on stack exchange, I didn't find this post, it was really helpful. To summarise my new understanding, if we follow a section of a wave that is moving, its phase must remain constant, hence the expression within the cosine must remain constant. As x decreases, time must increase, if x moves in the opposite direction (i.e. increases), time must decrease. Hence we put the plusminus sign in front of the time term to ensure the phase is constant. Could I clarify that my current understanding is accurate?
May 22, 2020 at 12:30 history closed BioPhysicist
Qmechanic
Duplicate of How to determine the direction of a wave propagation?
May 22, 2020 at 12:18 review Close votes
May 22, 2020 at 12:33
May 22, 2020 at 11:59 comment added BioPhysicist Does this answer your question? How to determine the direction of a wave propagation?
May 22, 2020 at 11:58 comment added BioPhysicist That isn't the wave function. That is just a possible solution to the wave equation.
May 22, 2020 at 11:48 comment added Ruslan @LucasTan you should calculate positions of the crests and how these positions depend on time.
May 22, 2020 at 11:13 comment added Lucas Tan To clarify, I should calculate the number of crests and troughs? Or should I solve for something else, if so, what exactly?
May 22, 2020 at 11:06 comment added Qmechanic Hint: Solve for the positions of crests and troughs in an $(x,t)$ diagram.
May 22, 2020 at 10:50 history edited user87745 CC BY-SA 4.0
added 86 characters in body; edited title
May 22, 2020 at 10:39 history asked Lucas Tan CC BY-SA 4.0