What wonderful rays can be used to find the image position of a point of an object in front of the lens?

A beam parallel to the main optical axis, after refraction in a converging lens, passes through the main focus. The beam passing through the optical center of the lens passes without changing direction.

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.