Final answer:
Dark matter cannot be detected by UV emission with any telescope as it does not interact with electromagnetic forces, making it invisible to even the most advanced and sensitive telescopes.
Step-by-step explanation:
The object that cannot be detected by UV emission, even with a large enough telescope, is dark matter. Dark matter does not emit or absorb light or other forms of electromagnetic radiation at any significant level, making it invisible to the entire electromagnetic spectrum including UV emissions.
Even though large telescopes like the Large Millimeter Telescope and the Atacama Large Millimeter Array can detect far-infrared and millimeter-wave radiation from distant galaxies, and the James Webb Space Telescope aims to observe the light of the first galaxies after the Big Bang, they are still unable to directly detect dark matter. Strong electromagnetic fields cannot reveal dark matter due to its non-interactive nature with electromagnetic forces.