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| Q. |
Light beam which is highly directional is called: |
| A. | eraser |
| B. | grazer |
| C. | maser |
| D. | laser |
| Answer» D. laser | |
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Explanation: Laser light is very different from normal light. It is very directional, has a very tight beam and is very strong and concentrated. The light released is monochromatic. It contains one specific wavelength of light (one specific colour). |
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