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?
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let us assume that the total energy in the electron and positron is combined and no loss occurs.
E = 2 * 0.51 * 10⁶ * 1.6 * 10⁻¹⁹ J = h c /λ
λ = 6.6 * 10⁻³⁴ * 3 * 10⁸ / [1.632 * 10⁻¹³] meters
= 1.21 pm
E = 2 * 0.51 * 10⁶ * 1.6 * 10⁻¹⁹ J = h c /λ
λ = 6.6 * 10⁻³⁴ * 3 * 10⁸ / [1.632 * 10⁻¹³] meters
= 1.21 pm
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