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ENTRANCE TEST – 2012 Multiple Questions and Answers.
| 6. | Laser light is monochromatic which means | ||
| A. | It consists of one ray of light | ||
| B. | It consists of one wavelength | ||
| C. | It consists of carbon monoxide gas | ||
| D. | It consists of photons having 1 eV energy | ||
| 9. | Which of the following can be used to produce population inversion for the emission of Laser? | ||
| A. | Optical pumping | ||
| B. | Optical fibre | ||
| C. | Optical instrument | ||
| D. | Optical polarization | ||
| 10. | What is the charge on alpha particles emitted during the phenomenon of radioactivity? | ||
| A. | +e | ||
| B. | –e | ||
| C. | –2e | ||
| D. | +2e | ||
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