Quote:
Originally Posted by Robh
Not necessarily. Gravitational lensing occurs when light from a distant object is "bent" by a foreground object of significant mass and focussed in the line of sight of the observer. Einstein published an article on it in 1936 but a visual confirmation did not occur until 1979. It is a fairly flukey occurrence this line of sight and relatively quite rare. In the case of anti-matter, as Carl alluded to, the light would diverge away from this line of sight. No lensing would be observed and nothing out of the ordinary would be perceived. There would be nothing to conclude.
Regards, Rob
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Rob, not necessarily ( sorry... I could not resist
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If there is enough antimatter to affect the expansion of the universe, surely there must be enough of it to affect the lensing (here and there.. if antimatter has negative gravitation). Instead, only positive lensing was observed, and the observed amount of effect even suggest more mass (dark matter?) than is (currently) visible..