Answer:
Electric flux will be
Explanation:
Let the point charge enclosed by Gaussian surface is q
We have to find the electric flux through this Gaussian surface
According to Gauss law electric flux through any closed surface is equal to times of charged enclosed by the surface.
So electric flux will be
Gauss law is only valid for closed surface it is not applied for open surface
Sonography is most likely because it has good resolution without radiation.