what is stokes law?define them.
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The force of viscosity on a small sphere moving through a viscous fluid is given by: ... Fd is the frictional force – known as Stokes' drag – acting on the interface between the fluid and the particle. η is the dynamic viscosity
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1.
a law stating that in fluorescence the wavelength of the emitted radiation is longer than that of the radiation causing it. This is not true in all cases.
2.
an expression describing the resisting force on a particle moving through a viscous fluid and showing that a maximum velocity is reached in such cases, e.g. for an object falling under gravity through a fluid.
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