Waves produced at the surface of water by a pencil executing vibrating motion if held vertically at a frequency of 50Hz are__________________?

(A) Longitudinal (X)
(B) Transverse (X)
(C) Periodic (X)
(D) both A and C ()

Answers: Waves produced at the surface of water by a pencil executing vibrating motion if held vertically at a frequency of 50Hz are both A and C.