Redirect Notice
 The previous page is sending you to https://fr.quora.com/Si-deux-photons-se-heurtant-peuvent-cr%C3%A9er-une-paire-%C3%A9lectron-positron-est-ce-que-%C3%A7a-veut-dire-que-leurs-%C3%A9nergies-sont-converties-en-masse.

 If you do not want to visit that page, you can return to the previous page.