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ENTRANCE TEST – 2015 Multiple Questions and Answers.
| 1. | One method of creating an inverted population is known as _________ and consist of illuminating the laser material with light. | ||
| A. | Optical Pumping | ||
| B. | Excitation | ||
| C. | Bremsstrahlung | ||
| D. | Holography | ||
| 2. | In population inversion (Ruby Laser) atoms can reside in the excited state for: | ||
| A. | 10-11 | ||
| B. | 10-8 | ||
| C. | 10-3 | ||
| D. | 10+3 | ||
| 4. | In the reaction, 92Th 234 → Y 91 234 + -1e 0 the electron e -1 0 emits from the | ||
| A. | 1st Orbit | ||
| B. | 2nd Orbit | ||
| C. | Nucleus | ||
| D. | Valence Shell | ||
| 5. | According to the equation ZX A → Y + 3α particles, what are the atomic and mass numbers of ‘Y’? | ||
| A. | Z – 6, A – 12 | ||
| B. | Z – 2, A – 4 | ||
| C. | Z + 1, A | ||
| D. | Z + 3, A | ||
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