Find the wavelength of the photons emitted when an electron and a positron

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

Problem

Find the wavelength of the photons emitted when an electron and a positron, initially at rest, annihilate each other. (Use

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

c=3.00\times10^{8}\,\text{m s}^{-1}

1\,\text{eV}=1.60\times10^{-19}\,\text{J}

.) (a)

3.86\times10^{-13}\,\text{m}

(b)

2.43\times10^{-12}\,\text{m}

(c)

1.22\times10^{-12}\,\text{m}

(d)

2.43\times10^{-10}\,\text{m}