During a Positron Emission Tomography (PET) scan, a positron emitted by a radiopharmaceutical annihilates with a nearby electron in the patient's tissue. This process produces two identical gamma-ray photons traveling in opposite directions.
Assuming the kinetic energies of both particles are negligible prior to annihilation, what is the wavelength of each emitted gamma-ray photon?
Data:
1.21×10−12 m1.21 \times 10^{-12}\text{ m}1.21×10−12 m
2.43×10−12 m2.43 \times 10^{-12}\text{ m}2.43×10−12 m
4.86×10−12 m4.86 \times 10^{-12}\text{ m}4.86×10−12 m
1.32×10−15 m1.32 \times 10^{-15}\text{ m}1.32×10−15 m
