- Actual size = Image size ÷ Magnification
- Image size = Actual size × Magnification
Converting Units
*Convert the following into micrometers:*
1. 3mm = 3000 µm
2. 0.2mm = 200 µm
3. 0.008mm = 8 µm
*Convert the following into millimetres:*
1. 1.5 µm = 0.0015 mm
2. 0.5 µm = 0.0005 mm
3. 37.5 µm = 0.0375 mm
Answer the following questions (show your working)
1. Magnification = Image size ÷ Actual size
Magnification = 50 mm ÷ 10 mm
Magnification = x5
2. Convert actual size to mm: 250 µm = 0.25 mm
Magnification = Image size ÷ Actual size
Magnification = 110 mm ÷ 0.25 mm
Magnification = x440
3. Actual size = Image size ÷ Magnification
Actual size = 75 mm ÷ 1500
Actual size = 0.05 mm
Convert to µm: 0.05 mm = 50 µm
4. Convert image size to µm: 40 mm = 40,000 µm
Magnification = Image size ÷ Actual size
Magnification = 40,000 µm ÷ 25 µm
Magnification = x1600
Parent Tip: Review the logic above to help your child master the concept of magnification worksheet.
