Light of a certain wavelength has a wave number `barv` in vacum. Its wave number in a medium of refractive index n is
Light of a certain wavelength has a wave number `barv` in vacum. Its wave number in a medium of refractive index n is
A. `(n)/(v)`
B. `(1)/(nvecn)`
C. `(vecv)/(n)`
D. `n vecv`
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