A deep-sea diver may hurt his eardrum during diving because of

CONCEPT:

• The normal force exerted by liquid at rest on a given surface in contact with it is called the thrust of liquid on that surface.
• The normal force (or thrust) exerted by liquid at rest per unit area of the surface in contact with it, is called pressure of liquid or hydrostatic pressure.
• If P_o is the atmospheric pressure then for a point at depth h below the surface of a liquid of density ρ,
• Hydrostatic pressure P is given by

P = P_o + ρgh

EXPLANATION:

• In normal condition or at standard pressure (normal atmospheric pressure in air ) inside eardrum and outside pressure is the same, this means force exerted on both side of eardrums are same.
• Now if we go underwater, then pressure outside eardrums will be greater than that of inside.
• And this will create a pressure difference between inside and outside of eardrums, because of this water will exert force on eardrum.
• Hence as deep-sea diver further goes deep inside, water pressure will keep on increases which will cause permanent damage to its eardrums because of this pressure difference.