question_answer

Which of the following equation represents a progressive wave?

A)  \[y=\,A\cos \,ax\,\sin bt\]

B)  \[y=\,A\,\sin \,bt\]

C)  \[y=\,A\,\cos (ax+bt)\]  

D)  \[y=\,A\,\tan (ax+bt)\]

Correct Answer: C

Solution :

If after\[t\]time, displacement of particle is y, then the equation of progressive wave \[y=A\text{ }cos(\omega x+bt)\]