Two identical neutrons are moving such that neutron X has kinetic energy and neutron…

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

Problem

Two identical neutrons are moving such that neutron X has kinetic energy

25\,\text{eV}

and neutron Y has kinetic energy

100\,\text{eV}

. What is the ratio

\dfrac{\lambda_X}{\lambda_Y}

of their de Broglie wavelengths? (a)

4.0

(b)

2.0

(c)

1.732

(d)

0.50