When the moon is behind the earth vis-à-vis the sun, we see the entire face of the moon illuminated by the sun, and this is called a full moon.
चन्द्रमा पृथ्वीको धेरै नजिक आउनेछ त्यसैकारण चन्द्रमा सामान्यभन्दा निकै ठूलो देखिनेछ ।