1.A magnifying glass with a focal length 15centimeters is placed 12 centimeters above a stamp. Where is the image?
A.10cm B.20cm C.30cm D.60cm E.80cm

2.A magnifying glass with focal length 15centimeters is placed 12centimeters above a stamp. What is the magnification?
A.1 B.5 C.7 D.9 E.11

3. A magnifying glass with focal length 15centimeters above a stamp. What kind of image is produced.
A.virtual B.real C.virtual and real D.not enough informatioin D.smaller