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. |
During a straight-edge diffraction experiment, a light of wavelength 400 nm was used. What would be the position of the first minimum, if the separation between the edge and the source is 10 cm while that between the edge and eyepiece is 2 m? |
| A. | 1.01 cm |
| B. | 2.03 cm |
| C. | 0.57 cm |
| D. | 1.56 cm |
| Answer» D. 1.56 cm | |
| 2. |
The radius of the first zone in a zone plate of focal length 25cm for a light of wavelength 5000 Å is ____ |
| A. | 0.01 cm |
| B. | 0.02 cm |
| C. | 0.03 cm |
| D. | 0.04 cm |
| Answer» D. 0.04 cm | |
| 3. |
The zone plate behaves like a ____________ |
| A. | Concave Lens with multiple foci |
| B. | Convex Lens with multiple foci |
| C. | Convex Lens with single foci |
| D. | Concave Lens with single foci |
| Answer» C. Convex Lens with single foci | |
| 4. |
Intensity at O due to the entire wavefront is x times that due to the first half period zone. What is x? |
| A. | 4 |
| B. | 2 |
| C. | 1/2 |
| D. | 1/4 |
| Answer» E. | |
| 5. |
The radius of the half period zone is proportional to ___________ |
| A. | The wavelength of light |
| B. | The square root of the frequency of light |
| C. | The square root of the wavelength light |
| D. | The frequency of light |
| Answer» D. The frequency of light | |
| 6. |
What is the variation in the pattern observed for single slit Fresnel diffraction than single slit Fraunhofer Diffraction? |
| A. | The pattern is not hyperbolic |
| B. | The fringes are too thin |
| C. | The region of minimum intensity is not completely dark |
| D. | The fringes are colored |
| Answer» D. The fringes are colored | |
| 7. |
In Fresnel diffraction, the relative phase difference between the curved wavefront is ____________ |
| A. | Constant |
| B. | Zero |
| C. | Linearly increasing |
| D. | Non=constant |
| Answer» E. | |
| 8. |
Which of the following is called the obliquity factor? |
| A. | cosθ |
| B. | sinθ |
| C. | 1 + cosθ |
| D. | 1 + sinθ |
| Answer» D. 1 + sinθ | |
| 9. |
How many lenses are used in Fresnel Diffraction? |
| A. | Two Convex lenses |
| B. | Two Concave lenses |
| C. | One Convex lens |
| D. | No lens used |
| Answer» E. | |