match them

Matching exercise

    
Match the items on the right to the items on the left.
when object is at infinity
when object is at centre of curvature
when object is at centre of curvature
when object is between centre of curvature and focus
when the object is at focus
image formed on focus
image is between principal focus and centre of curvature
image is on centre of curvature
image is beyond C
image is at infinity