A scientist is studying a politician's brain. He must use amagnifying glass,which is a simple convex lens. He knows that theradius of curvature of the lens is 80cm.He also knows that theneeds a magnification four (m=4) to see anything sensiblecalculate:
i) How far away from the brain he needs to hold thelens.
ii) How far away from the lens the image is formed.
iii) Whether the image is upright or onverted.
iv) Whether the image is real or virtual.