1/f = 1/Di + 1/Do
1/Di = 1/f - 1/Do
1/Di = 1/4 - 1/5
1/Di = 1/20
Di = 20 cm
In my drawing i had a focal point of 4 so a center of circumference of 8 and I had an object with a height of 1 cm placed 1 cm after the focal point, so 5 cm, away from the mirror. The distance of the image that i...