Definition of apparent diameter. Meaning of apparent diameter. Synonyms of apparent diameter
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Definition of apparent diameter
apparent diameter 4. Greatness; grandeur. ``With plain, heroic magnitude of
mind.' --Milton.
5. Greatness, in reference to influence or effect;
importance; as, an affair of magnitude.
The magnitude of his designs. --Bp. Horsley.
Apparent magnitude (Opt.), the angular breadth of an object
viewed as measured by the angle which it subtends at the
eye of the observer; -- called also apparent diameter.
Magnitude of a star (Astron.), the rank of a star with
respect to brightness. About twenty very bright stars are
said to be of first magnitude, the stars of the sixth
magnitude being just visible to the naked eye. Telescopic
stars are classified down to the twelfth magnitude or
lower. The scale of the magnitudes is quite arbitrary, but
by means of photometers, the classification has been made
to tenths of a magnitude.
