Space telescopes carrying long-wavelength infrared detectors must carry _______________ for their optics to avoid the insides of the telescope and instruments from blinding the detectors
Fill in the blank(s) with correct word
coolant
liquid helium
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Since brown dwarfs cannot ignite hydrogen fusion, how might we hope to spot them? What role does deuterium play in this?
What will be an ideal response?
In a one-dimensional elastic collision of two identical masses, the masses exchange velocities
Indicate whether the statement is true or false
The _____ of active galactic nuclei (AGN) is an attempt to explain the different types of AGN using a single model viewed from different directions
A) hierarchical model B) hybrid hierarchical model C) monolithic model D) unified model
Resolution: Even with perfect optics, what is the resolution limit (in radians) of the Hubble Space Telescope when it is focusing light of wavelength 400 nm? The mirror diameter is 2.4 m.
Fill in the blank(s) with the appropriate word(s).