MCQOPTIONS
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MCQOPTIONS
This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Physics Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A grating has 16000 per inch over a length of 5 inches. What will be the smallest wavelength difference for a light of wavelength 6000 Å? |
| A. | 0.01 Å |
| B. | 0.02 Å |
| C. | 0.03 Å |
| D. | 0.04 Å |
| Answer» D. 0.04 Å | |
| 2. |
The following pattern was observed by a plane diffraction grating. How are the two images resolved? |
| A. | Not resolved |
| B. | Just Resolved |
| C. | Partially resolved |
| D. | Well resolved |
| Answer» C. Partially resolved | |
| 3. |
What is the minimum number of lines per cm in a 2.5 cm wide grating spectrum which will just resolve two sodium lines (5890 Å and 5896 Å) in the first order spectrum? |
| A. | 98 |
| B. | 196 |
| C. | 392 |
| D. | 694 |
| Answer» D. 694 | |
| 4. |
Light is incident normally on a grating of width 5 X 10-3 m with 2500 lines. What is the resolving power of the grating in the second order spectrum? |
| A. | 2500 |
| B. | 5000 |
| C. | 1250 |
| D. | 500 |
| Answer» C. 1250 | |
| 5. |
If a light is incident on a grating with 5000 lines/cm, then the angular separation of the two lines (5000 Å and 5006 Å) in first order spectrum is ______ |
| A. | 0.01° |
| B. | 0.02° |
| C. | 0.03° |
| D. | 0.04° |
| Answer» C. 0.03° | |