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. |
Which graph is shown in the figure? |
| A. | Amplitude variation with the number of exposed zones |
| B. | Intensity variation with the number of exposed zones |
| C. | Frequency variation with the number of exposed zones |
| D. | Phase variation with the number of exposed zones |
| Answer» C. Frequency variation with the number of exposed zones | |
| 3. |
Light of 6000 Å is incident on a circular hole and is received on a screen 50 cm away. What is the radius of the hole, if the intensity of light on the screen is 4 times the intensity without the hole? |
| A. | 0.025 cm |
| B. | 0.047 cm |
| C. | 0.054 cm |
| D. | 0.089 cm |
| Answer» D. 0.089 cm | |
| 4. |
Light of 5000 Å is incident on a circular hole of radius 1 cm. How many half period zones are contained in the circle if the screen is placed at a distance of 1 m? |
| A. | 20 |
| B. | 200 |
| C. | 2000 |
| D. | 20000 |
| Answer» E. | |