Consider the wave equation y = 5mm sin [1cm−1 x – 60s−1t]. The wave number is?

Consider the wave equation y = 5mm sin [1cm−1 x – 60s−1t]. The wave number is?
A. 0.1 cm−1
B. 10cm−1
C. 1.0cm−1
D. 2cm−1
Correct Option: Answer is C
The angular wave number k = 2π/λ expresses the number of radians in a unit of distance.

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