Question

E=mc^2 is this stament is true ?can we find mass?​

Answer 1

yes it is true

we can find defect mass to it........

coz... e = energy form

c = speed of light or air....3×10^8m/s

Answer 2

asked this question because at microphysical-level the mass-energy equivalence seems well-established, e.g., a collision between the positron (e+) and the electron (e−) results in their simultaneous disappearance, their masses (m) being converted into energy (E) in accordance with the mass-energy equivalence E = mc². This process is called annihilation, and the resultant energy is emitted in the form of gamma rays (γ), high energy quanta of electromagnetic radiation. The inverse reaction 2γ → e+ + e− can also proceed under appropriate conditions, and the process is called electron-positron creation, or pair production. However, at macrophysical-level, the said equivalence is not very clear.