Why is the diameter of the Sun in the range of meter radio waves noticeably larger than its diameter in the range of visible light?

Meter radio waves are emitted by the solar corona, which is larger than the visible disk of the Sun, created by the photosphere.

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.