Define wave number and angular wave number and give their S.I. Units.

1.	Define wave number and angular wave number and give their S.I. Units.
Answer» Solution :Wave number is the number of waves present in a unt distance of medium.`(v=1//lambda)`S.I. UNITOF `K` is rad `m^(-1)` Angular wave number or propagation constant is`k=2pi//lambda`It represents phase change per unit path difference and DENOTED byk = 2 π/λ. S.I. unit of k is rad `m^(-1)`.

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