# Confused about definition of wavelength!

1. Oct 26, 2012

### V0ODO0CH1LD

Wavelength of a sinusoidal wave is defined as the spatial period of the wave, which can be measured between any two points on the wave where the shape repeats. But if my wave is defined as a function of time (like those of a simple harmonic oscillator), how can you say the distance along the time axis is the wavelength? Am I measuring something else that just happens to be equal to the distance between two points in the same phase along the time axis? How can the time axis determine the wavelength of a wave? Also; isn't that distance the period? The amount of time it takes for the wave to complete one cycle? In which case the velocity of the wave would always equal one?

2. Oct 26, 2012

### ZapperZ

Staff Emeritus
Who says it is a wavelength?

In that case, this is now known as the period of oscillation, which you stated later.

Zz.

3. Oct 26, 2012

### Naty1

you mean just like a sine wave???

Time relates directly to frequency.....they are inverses.....

If you don't get what I mean, just plot some waves and LABEL the axes you choose to use....