,Explain the reason for the following:.
- Why the image formed below the principal axis is real and inverted only because the rays converges there and why the image can't be erect.
- Why the image formed above the principal axis is virtual and erect only because the light rays seems/appears to be converging there and can't it be inverted.
Dear Student ,
When the object is above the principal axis and its image forms below the axis then the image is inverted .Again here you know that as the rays converges to a certain point so here the image will also be real .
![Image result for inverted and real image](https://web.pa.msu.edu/courses/2000fall/PHY232/lectures/lenses/real_image.gif)
Now when the formed above the principal axis and the object is also on the same side of the principal axis then the image is said to be the erected image but the image is said to be virtual when the rays appear to be converging there and it is then said as the virtual image .
![Image result for virtual and erect image means](https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTOq3fAD_6btTDOUcW5xMlsiGOWjMt7hcg3txmHum_Kb9-f0-sl)
Regards
When the object is above the principal axis and its image forms below the axis then the image is inverted .Again here you know that as the rays converges to a certain point so here the image will also be real .
![Image result for inverted and real image](https://web.pa.msu.edu/courses/2000fall/PHY232/lectures/lenses/real_image.gif)
Now when the formed above the principal axis and the object is also on the same side of the principal axis then the image is said to be the erected image but the image is said to be virtual when the rays appear to be converging there and it is then said as the virtual image .
Regards