Question

what is Mathematical expression for a spherical wave

Answer 1

y = a sin (wt) ,where t= time ,w=angular velocity, a= amplitude.

Answer 2

(2.71) since k r= kry=kx. The wave has been effectively reduced to the one-dimensional disturbance. that propagate outward as spherical waves. "Spherical waves are waves in which the surfaces of common phase are spheres and the source of waves is a central point."

Hope it will helps ✌