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## Homework Statement

Please kindly help me.

Actually I don't quite understand what the meaning of harmonic wave is and the mathematics that expresses it.

h(x,y;t) = h sin(wt-kx+δ)

h represents the position of the particle in a particular time? Or the wave motion?

What is the physical meaning of w, k? What are they describing? Why the function is written as h sin(wt-kx+d)?

Can you explain that? My mathematic is not very good, to be honest.

1) What is the distance between two maxima/minima in an interference pattern of two waves u1 and u2 described by

u1(x) = cos(k1 x); u2(x) = cos(k2 x)

What happens when k1=k2?

2) "The so-called nami-water is good to our body!" Is the statement scientific (falsifiable), and why?

## Homework Equations

## The Attempt at a Solution

The distance between two maxima/minima in an interference pattern = the interfered wave's wavelength?