Phase Angle


phase an-gle
/feɪz ˈæŋ.ɡəl/

noun


The angle between the light from the sun and the light reflected from an observed object and it ranges from 0 to 180 degrees.
        Example:         

        The Moon at full phase has a phase angle close to 0°.
        At new Moon, the phase angle is close to 180°.

Source:  Cindy McKean

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