Fibre cross-sections

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• 2. Why does viscose reflect light? (3, 1, 6, 7)
• 3. What does the shape of a fibre's cross-section affect? (3, 6, 3, 6)
• 4. What does the cross-section of synthetic fibres look like? (4, 4, 5, 4)
• 5. How can the shape of a fibre be changed? (5, 1, 10)