The de Broglie wavelength associated with a proton is ( )

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

Problem

The de Broglie wavelength associated with a proton is

1.8\,\text{fm}

(

1\,\text{fm}=10^{-15}\,\text{m}

). Estimate the speed of the proton and choose the closest value. \,(Take

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

m_p = 1.67\times10^{-27}\,\text{kg}

and

c = 3.0\times10^{8}\,\text{m s}^{-1}

.) (a)

0.59\,c

(b)

0.12\,c

(c)

0.73\,c

(d)

0.25\,c