Which is true about surface waves?
a. it only has properties of longitudinal waves
b. it only has properties of transverse waves
c. it does not have either transverse or longitudinal waves
d. it has properties of both transverse and longitudinal waves

The correct option is (C).

Explanation:

In longitudinal wave, the vibrations of the particles of the medium are parallel to the direction of the motion of the wave.

In transverse wave, the vibrations of the particles of the medium are perpendicular to the direction of the motion of the wave.

In surface wave, the disturbances which travel in the circular motion. The surface wave is neither longitudinal nor transverse. The particles of the medium are perpendicular and parallel to the direction of the energy transportation.

Therefore, the correct statement about the surface wave is option (C).

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach