What kind of image is formed when the image distance is positive? what kind of image is formed when the image distance is negative?

When the distance is positive, real image is produced. When the distance is negative, virtual image is produced.

Explanation:

Image distance is the distance between the object to the lens of the mirror. When the image distance is positive, it means that the real image is produced in the mirror. When the image distance is negative, it means that the virtual or diminished image is produced in the mirror.

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees.