\(\beta \,\, = \,\,\frac{{\lambda D}}{d}\,\, = \,\,\frac{{1\,\, \times \,\,5896\,\, \times \,\,{{10}^{ - 10}}}}{{2\,\, \times \,\,{{10}^{ - 3}}}}\,\, \approx \,\,\,0.3\,\,\,mm\)

પાણી માં દુબડવામાં આવેછે 

\(\frac{{{\beta _w}}}{\beta }\,\, = \,\,\,\frac{{{\lambda _w}}}{\lambda }\,\, = \,\,\,\frac{\mu }{{{\mu _w}}}\,\,\, \Rightarrow \,\,\,{\beta _w} = \,\,\frac{1}{{4/3}}\,\, \times \,\,\,0.3\,\, = \,\,\,0.225\,\,mm\)