\b[The <real image> is upside down.] A converging <optical lens> produces negative <transverse magnification> on the screen: a point above the <optical axis> sends a central <light ray> through the <optical lens> centre to a point below the <optical axis>. The same happens in the horizontal direction. Viewed directly from behind, the screen therefore shows a picture rotated through $180^\circ$ relative to the scene.

Solution

Past exam of the physics 2 paper of the University of Oxford / 2021 resit / 2 / a / Solution

 Solution (source code)