26th December 2011 - 10:08 PM
QUOTE (Bryslon+Dec 26 2011, 06:13 PM)
Light bends only when there is speed change in eg water.
Wrong;- photons have invariant velocity, please remove lodged crayon from brain and read about photonic absorption and re-emission jazz ..... cretin!
27th December 2011 - 02:17 PM
Check out "refraction".
27th December 2011 - 02:22 PM
It's because dual nature of space-ether where energy flows.
27th December 2011 - 02:39 PM
That's why light regardless not having mass is still behaving like both particle and wave?
28th December 2011 - 02:00 PM
Thanks for the replies, everyone...I think I have some 'further reading' to do
28th December 2011 - 02:39 PM
QUOTE (Bryslon+Dec 27 2011, 02:17 PM)
14th January 2012 - 07:29 AM
General relativity predicts that the path of light is bent in a gravitational field; light passing a massive body is deflected towards that body. This effect has been confirmed by observing the light of stars or distant quasars being deflected as it passes the Sun.
Deflection of light (sent out from the location shown in blue) near a compact body (shown in gray)This and related predictions follow from the fact that light follows what is called a light-like or null geodesic—a generalization of the straight lines along which light travels in classical physics. Such geodesics are the generalization of the invariance of lightspeed in special relativity. As one examines suitable model spacetimes (either the exterior Schwarzschild solution or, for more than a single mass, the post-Newtonian expansion), several effects of gravity on light propagation emerge. Although the bending of light can also be derived by extending the universality of free fall to light, the angle of deflection resulting from such calculations is only half the value given by general relativity.
Closely related to light deflection is the gravitational time delay (or Shapiro effect), the phenomenon that light signals take longer to move through a gravitational field than they would in the absence of that field. There have been numerous successful tests of this prediction. In the parameterized post-Newtonian formalism (PPN), measurements of both the deflection of light and the gravitational time delay determine a parameter called γ, which encodes the influence of gravity on the geometry of space.
You con even check out Gravitational lensing and refraction
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