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Strong gravitational lensing by massive galaxy clusters can produce:
- Einstein rings
- Multiple images of background sources
- Magnification of faint objects
- All of these
Answer: All of these
Massive objects bend spacetime, deflecting light from background sources. Strong lensing creates arcs, rings, multiple images; used to map dark matter, study early galaxies. ISRO's AstroSat contributes to multi-wavelength lensing studies. [[NCERT Physics Class 11, IUCAA Reports]]