# NEET Physics Nuclei Questions Solved

The rest mass of an electron as well as that of positron is 0.51 MeV. When an electron and positron are annihilate, they produce gamma-rays of wavelength(s)

(a) 0.012 Å               (b) 0.024 Å
(c) 0.012 Å to $\infty$      (d) 0.024 Å to $\infty$