Q. A progressive wave y=a sin [(kx-ωt)] is reflected by a rigid wall at x=0. Then the reflected wave can be represented by
A) y=a sin (kx+ωt)
B) y=a cos (kx+ωt)
C) y=-a sin (kx-ωt)
D) y=-a sin (kx+ωt)
Explanation
(d) Given,
Progressive wave y=a sin (kx-ωt)
When reflected by right wall
Progressive wave y’= a sin [k(-x)-wt)]
Or y’ = a sin [-(kx+ωt)]
Or y’ = a sin (kx+ωt)
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.