A steel ball of mass m is moving with a kinetic energy K. The de Broglie wavelength associated with the ball is
1
\(\frac{\mathrm{h}}{2 \mathrm{mK}}\)
2
\(\sqrt{\frac{\mathrm{h}}{2 \mathrm{mK}}}\)
3
\(\frac{\mathrm{h}}{\sqrt{2 \mathrm{mK}}}\)
4
meaningless