MCQOPTIONS
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MCQOPTIONS
This section includes 4 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 screen is placed 2m away from the lens to obtain the diffraction pattern in the focal plane of the lens in a single slit diffraction experiment. What will be the slit width if the first minimum lies 5 mm on either side of the central maximum when plane light waves of wavelength 4000 Å are incident on the slit? |
| A. | 0.16 mm |
| B. | 0.26 mm |
| C. | 0.36 mm |
| D. | 0.46 mm |
| Answer» B. 0.26 mm | |
| 2. |
A diffraction pattern is obtained with a straight edge using light of wavelength 5500 Å. The separation between the edge and the source is 15 cm while that between the edge and the eyepiece is 3 m. What is the position of the first maximum? |
| A. | 1.01 cm |
| B. | 2.03 cm |
| C. | 0.46 cm |
| D. | 1.56 cm |
| Answer» B. 2.03 cm | |
| 3. |
The following pattern is observed for which experiment? |
| A. | Fabry-Perot Interferometer |
| B. | Double Slit Fraunhofer Diffraction |
| C. | Single Slit Fraunhofer Diffraction |
| D. | Fresnel Diffraction |
| Answer» D. Fresnel Diffraction | |
| 4. |
If the Fresnel’s distance is a, then what should be the distance of the screen from the slit, d, such that ray optics is no longer valid? |
| A. | d > a |
| B. | d < a |
| C. | d = a |
| D. | No relation between d and a |
| Answer» C. d = a | |