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 diffraction grating has 4000 lines/cm. The dispersive power of the grating in the third order spectrum in the wavelength region of 5000 Å is _____________ |
| A. | 5000 |
| B. | 10000 |
| C. | 15000 |
| D. | 20000 |
| Answer» D. 20000 | |
| 2. |
What is shown by the following curve? |
| A. | Resultant Amplitude Curve |
| B. | Resultant Interference Pattern |
| C. | Resultant Intensity Curve |
| D. | Resultant Diffraction Pattern |
| Answer» D. Resultant Diffraction Pattern | |
| 3. |
What is the highest order spectrum which may be seen with a monochromatic light of wavelength 5000 Å by means of a diffraction grating with 5000 lines/cm? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 4. |
A beam of monochromatic light is incident on a plane transmission grating having 5000 lines/cm and the second order spectral line is found to be diffracted at 30°. The wavelength of the light is _______ |
| A. | 4000 Å |
| B. | 5000 Å |
| C. | 6000 Å |
| D. | 7000 Å |
| Answer» C. 6000 Å | |
| 5. |
If (a + b) < nλ, then nth order spectrum will be absent. |
| A. | True |
| B. | False |
| Answer» B. False | |