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| Q. |
Optic fibres are used in : |
| A. | CAT scans |
| B. | X-ray photos |
| C. | Ultrasound scans |
| D. | Endoscopy |
| Answer» D. Endoscopy | |
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Explanation: Optical fibres are used in endoscopic instruments that enable doctors to view internal body parts without having to perform surgery. Fernando Alves Martins of Portugal invented the first fiber optic endoscope in 1963-64. Further innovations included using additional fibres to channel light to the objective end from a powerful external source, thereby achieving the high level of full spectrum illumination that was needed for detailed viewing, and colour photography. |
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