question_answer

The equation \[\overrightarrow{\varphi \,}(x,\,t)=\overrightarrow{j\,}\sin \,\left( \frac{2\pi }{\lambda }v\,t \right)\cos \,\left( \frac{2\pi }{\lambda }x \right)\] represents [MNR 1994]

A)            Transverse progressive wave

B)            Longitudinal progressive wave

C)            Longitudinal stationary wave

D)            Transverse stationary wave