Why does the disc of the moon at a full moon appear larger than the black silhouette of the moon during a total solar eclipse?

The reason is in a purely physiological feature of human vision – irradiation, due to which a bright object appears somewhat larger than a dark object of the same angular size.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.