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- https://phys.libretexts.org/Courses/Skidmore_College/Introduction_to_General_Relativity/04%3A_Light_Orbits/4.03%3A_LensingWhen a photon passes a massive object, the path of the photon is deflected. The photon may be deflected and collide with the massive object (or fall into the singularity), or the photon may "swing aro...When a photon passes a massive object, the path of the photon is deflected. The photon may be deflected and collide with the massive object (or fall into the singularity), or the photon may "swing around" the massive object (possibly multiple times) and escape. In the last section, we discussed a method to get qualitative information about the path. In this section, we will look at how to get quantitative information about the light path under very specific conditions.
- https://phys.libretexts.org/Bookshelves/Astronomy__Cosmology/Big_Ideas_in_Cosmology_(Coble_et_al.)/12%3A_Gravitational_Lenses/12.02%3A_Lensing_by_Point_MassesYou will understand how the lensing effect depends on the relative positions of the source, lens and observer and understand that the mass of the lens can be determined using gravitational lensing. Yo...You will understand how the lensing effect depends on the relative positions of the source, lens and observer and understand that the mass of the lens can be determined using gravitational lensing. You will understand that objects such as dim stars, brown dwarfs, and stellar remnants (white dwarfs, neutron stars, black holes) can act as gravitational lenses - collectively called MACHOs.
- https://phys.libretexts.org/Courses/Chicago_State_University/PH_S_1150%3A_Basic_Astronomy/12%3A_Gravitational_Lenses/12.02%3A_Lensing_by_Point_MassesYou will understand how the lensing effect depends on the relative positions of the source, lens and observer and understand that the mass of the lens can be determined using gravitational lensing. Yo...You will understand how the lensing effect depends on the relative positions of the source, lens and observer and understand that the mass of the lens can be determined using gravitational lensing. You will understand that objects such as dim stars, brown dwarfs, and stellar remnants (white dwarfs, neutron stars, black holes) can act as gravitational lenses - collectively called MACHOs.
