MCQOPTIONS
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MCQOPTIONS
This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the region enclosed by the optical cavity called? |
| A. | Optical Region |
| B. | Optical System |
| C. | Optical box |
| D. | Optical Resonator |
| Answer» E. | |
| 2. |
The output of a laser has pulse duration of 30 ms and average output power of 1 W per pulse. How much energy is released per pulse if wavelength is 6600 ? |
| A. | 0.001 J |
| B. | 0.002 J |
| C. | 0.003 J |
| D. | 0.004 J |
| Answer» D. 0.004 J | |
| 3. |
The meta-stable state have a larger lifetime then lower energy state. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
At least 2 levels are required in a crystal to achieve population inversion. |
| A. | True |
| B. | False |
| Answer» C. | |
| 5. |
Direct conversion of electrical energy into radiation takes place in ___________ |
| A. | Ruby laser |
| B. | ND: YAG |
| C. | LED |
| D. | He-Ne laser |
| Answer» D. He-Ne laser | |
| 6. |
Pumping is done in order to achieve __________ |
| A. | Steady state |
| B. | Population inversion |
| C. | Equilibrium |
| D. | Photon emission |
| Answer» C. Equilibrium | |
| 7. |
Optical pumping happens via ___________ |
| A. | Spontaneous emission |
| B. | Spontaneous Absorption |
| C. | Stimulated emission |
| D. | Stimulated Absorption |
| Answer» E. | |