A neutron is travelling at

PHYSICS · Single correct · A Level · Physics · Particles and radiation · Particles and radiation

Problem

4.0\,\text{km s}^{-1}

. Find its de Broglie wavelength. \,(Use

h = 6.63\times10^{-34}\,\text{J s}

and

m_n = 1.675\times10^{-27}\,\text{kg}

.) (a)

0.20\,\text{nm}

(b)

0.10\,\text{nm}

(c)

0.050\,\text{nm}

(d)

0.40\,\text{nm}