The speed of the plane wave defined by sin(ωt−kx) is 2.864 × 10⁸ m/s
Speed of a wave
the speed of the plane wave defined by sin(ωt−kx) is v = ω/k where
- ω = angular frequency of wave and
- k = wave number of wave
Now ω = 3376.7 Thz = 3376.7 × 10¹² Hz and k = 11.79μm⁻¹ = 11.79 × 10⁶ m⁻¹
So, substituting the values of the variables into v, we have
v = ω/k
v = 3376.7 × 10¹² Hz/11.79 × 10⁶ m⁻¹
v = 286.4 × 10⁶ m/s
v = 2.864 × 10⁸ m/s
The speed of the plane wave defined by sin(ωt−kx) is 2.864 × 10⁸ m/s
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