Everyday Objects:
• Paper thickness: 0.01 cm (100 μm)
• Human hair: 0.005-0.018 cm (50-180 μm)
• Dust particle: 0.001-0.01 cm (10-100 μm)
• Fingernail: 0.05-0.1 cm (500-1,000 μm)
Biological Structures:
• Red blood cell: 0.0008 cm (8 μm)
• Bacteria: 0.0001-0.0005 cm (1-5 μm)
• Cell wall: 0.00001-0.0001 cm (0.1-1 μm)
• Virus: 0.000002-0.00004 cm (0.02-0.4 μm)
Manufacturing & Technology:
• Semiconductor features: 0.0000005-0.0001 cm (0.005-1 μm)
• Surface roughness: 0.000001-0.001 cm (0.01-10 μm)
• Precision machining: 0.000001 cm (0.01 μm) tolerance
• Optical coatings: 0.000005-0.0001 cm (0.05-1 μm)