alleryThe phase speed of a sinusoidal wave is given by
A$v=\lambda\tau$
B$v=\dfrac{\omega}{k}$
C$v=\omega k$
D$v=\dfrac{k}{\omega}$
Answer & Solution
Correct answer: B. $v=\dfrac{\omega}{k}$
For a sinusoidal wave, phase speed is $v=\dfrac{\lambda}{T}=\dfrac{\omega}{k}$.
Option B matches this standard relation.
**Option A is incorrect because the period appears in the denominator, not numerator.**
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