question_answer

      Which one among the following statements is not correct?                            [NDA]

A) In progressive waves, the amplitude may be constant and neighbouring points are out of phase with each other

B) In air or other gases, a progressive antinode occurs at a displacement node and a progressive node occurs at a displacement antinode

C) Transverse wave can be polarised while longitudinal wave cannot be polarised

D) Longitudinal wave can be polarised while transverse wave cannot be polarised