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| Q. |
What is the wavelength of light produced by He-Ne laser in laser inspection? |
| A. | 6988 Å |
| B. | 5328 Å |
| C. | 5928 Å |
| D. | 6328 Å |
| Answer» D. 6328 Å | |
| Explanation: he-ne lasers are used in laser inspection. light produced by he-ne lasers is at a wavelength of 6328 Å or 0.6 μm and that is in phase and coherent. this source is a 1000 times more intense than other monochromatic sources. | |
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