convex lens subgroup of lens, 7 assertions
CapableOf 2
form image 0.48
converge light rays 0.25
HasA 1
focal length of 10 cm 0.25
HasProperty 1
thicker 0.68
IsA 1
converging lens 0.61
ReceivesAction 2
arranged at position 0.42
used as magnifying glass 0.25