I am a High School student and was reading Wave Motion and Waves on a String from a popular Indian textbook of Physics, "Concepts of Physics" by Prof. HC Verma.
In the derivation of a wave velocity on a string,the author asks one to visualise the condition as follows:
"Suppose a wave y=f(t - x/v) is travelling on the string in the positive x-direction with a speed v. Let us chose an on observer who is riding on a car that moves along the x-direction with the same velocity v. Looking from this frame, the pattern of the string is at rest but the entire string is moving towards the negative x-direction with a speed v. If a crest is opposite to the observer st any instant,it will always remain opposite to him with the same shape while the string will pass through this crest in opposite direction like a snake. "
Tried to find animations which can help me with the visualisation by searching keywords but couldn't find any.
If anyone can post a relevant animation or simplify the extract for me and make it easier to understand,it would be of great help.
Sorry if this is an obvious or easy-to-understand extract. I am generally good at English,but I think failure to understand the extract para properly has somewhat to do with English not being my first language.