The de-Broglie wavelength of a particle of \( \mathrm{KE}, K \) is ...

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The de-Broglie wavelength of a particle of \( \mathrm{KE}, K \) is \( \lambda \). What will be the wavelength of the particle, if it's kinetic energy is \( \frac{K}{9} \) ?
(a) \( \lambda \)
(b) \( 2 \lambda \)
(c) \( 3 \lambda \)
(d) \( 4 \lambda \)
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