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Genrish500 [490]
3 years ago
7

A focal arrangement that has a secondary mirror that reflects the focused light back through a hole in the primary mirror is a _

______________.
a. Cassegrain focus
b. Newtonian focus
c. Schmidt-Cassegrain focus
d. Schmidt focus
Biology
1 answer:
sveticcg [70]3 years ago
7 0
<span> a. Cassegrain focus</span> is the focal arrangement in a Cassegrain reflector used in optical telescopes and radio antennas. The primary mirror is a concave mirror, and the secondary mirror that reflects the focused light back to it is a convex mirror.
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