- #1

Ichijou Maeve

- 1

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"Points P₁ and P₂ are both on antinodal lines. The length of the path traveled by wave 1 from its source (S₁) to point P₁ is two wavelengths. The length of the path traveled by wave 2 from its source (S₂) to point P₁ is three wavelengths. The path difference (pd) is therefore one wavelength; pd = 1 λ. All points on the antinodal line n = 1 have the path difference pd = 1 λ."

But no matter how many times I read through it I just don't understand what a path difference is meant to be... Could I get a clear explanation of what a path difference is and why it is important?

Thank you,

Ichijou