Given below are some functions of x and t to represent the displacement (transverse or longitudinal) of an elastic wave. Some which of these represent (i) a travelling wave, (ii) a stationary wave or (iii) none at all: (a) y = 2 cos (3 x) sin (10 t) (b) y = 2 sqrt(x - v t) (c ) y = 3 sin (5 x - 0.5 t) + 4 cos(5 x - 0.5 t) (d) y = cos x sin t + cos 2x sin 2t

Given below are some functions of x and t to represent the displacemen

1.	Given below are some functions of x and t to represent the displacement (transverse or longitudinal) of an elastic wave. Some which of these represent (i) a travelling wave, (ii) a stationary wave or (iii) none at all: (a) y = 2 cos (3 x) sin (10 t) (b) y = 2 sqrt(x - v t) (c ) y = 3 sin (5 x - 0.5 t) + 4 cos(5 x - 0.5 t) (d) y = cos x sin t + cos 2x sin 2t
Answer» SOLUTION :(a) Stationary wave (B) Unacceptable function for any wave (c ) TRAVELLING harmonic wave (d) SUPERPOSITION of TWO stationary waves.