With the help of a lens, an image of an object is obtained. When can it be seen on the screen

With the help of a lens, an image of an object is obtained. When can it be seen on the screen – when is this image valid or when is it imaginary?

When the real is the screen at the focus of the lens, the imaginary cannot be obtained.

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.