MCQOPTIONS
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MCQOPTIONS
This section includes 9 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. |
He-Ne laser is used in Holography. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
When the transition takes place from En6 -> En5, what is the wavelength of produced beam? |
| A. | 6328 Å |
| B. | 33913 Å |
| C. | 11523 Å |
| D. | 7550 Å |
| Answer» C. 11523 Å | |
| 3. |
The output of a He-Ne laser has pulse duration of 15 ms and average output power of 1 W per pulse. How much energy is released per pulse? |
| A. | 5 mJ |
| B. | 10 mJ |
| C. | 15 mJ |
| D. | 20 mJ |
| Answer» D. 20 mJ | |
| 4. |
The number of photons emitted for a 2.5 mW He-Ne laser is __________ |
| A. | 4.9 X 1015 |
| B. | 5.9 X 1015 |
| C. | 6.9 X 1015 |
| D. | 7.9 X 1015 |
| Answer» C. 6.9 X 1015 | |
| 5. |
The He-Ne laser operates at a wavelength of ____________ |
| A. | 540 nm |
| B. | 632 nm |
| C. | 690 nm |
| D. | 717 nm |
| Answer» C. 690 nm | |
| 6. |
Which pumping method is used in He-Ne laser? |
| A. | Optical Pumping |
| B. | Electrical Excitation |
| C. | Chemical Pumping |
| D. | Direct Conversion |
| Answer» C. Chemical Pumping | |
| 7. |
He-Ne laser is a type of ____________ |
| A. | Solid laser |
| B. | Liquid laser |
| C. | Gas laser |
| D. | Diode laser |
| Answer» D. Diode laser | |
| 8. |
The difference between He-Ne Laser is __________ |
| A. | It gives pulsed output |
| B. | It gives a non-continuous laser beam |
| C. | It gives a continuous laser beam |
| D. | No difference |
| Answer» D. No difference | |
| 9. |
Which of the following is a four-level laser? |
| A. | ND: YAG |
| B. | Ruby |
| C. | He-Ne |
| D. | Argon laser |
| Answer» D. Argon laser | |