MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 7 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. |
The angular separation between the central maximum and first order minimum of the diffractions pattern due to a single slit of width 0.25 mm, when light of wavelength 5890 Å is incident normally on the slit, is ________ |
| A. | 7.1 minute |
| B. | 8.1 minute |
| C. | 9.1 minute |
| D. | 10.1 minute |
| Answer» C. 9.1 minute | |
| 2. |
What is the half angular width of the central bright maximum in the Fraunhofer diffraction pattern of a slit of width 12 X 10-7m when the slit is illuminated by monochromatic light of wavelength 6000 Å. |
| A. | 20° |
| B. | 30° |
| C. | 40° |
| D. | 50° |
| Answer» C. 40° | |
| 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» C. Single Slit Fraunhofer Diffraction | |
| 4. |
In Double Slit Fraunhofer Diffraction, some orders of interference pattern are missing. It is called _____ |
| A. | Missing Spectra |
| B. | Absent Spectra |
| C. | End Spectra |
| D. | Emission Spectra |
| Answer» C. End Spectra | |
| 5. |
How shall the pattern change when white light is used in Fraunhofer Diffraction instead of monochromatic light? |
| A. | The pattern will no longer be visible |
| B. | The shape of the pattern will change from hyperbolic to circular |
| C. | The colored pattern will be observed with a white bright fringe at the center |
| D. | The bright and dark fringes will change position |
| Answer» D. The bright and dark fringes will change position | |
| 6. |
What happens with the Fraunhofer single slit diffraction pattern if the whole apparatus is immersed in water? |
| A. | The Wavelength of light increases |
| B. | Width of central maximum increases |
| C. | Width of central maximum decreases |
| D. | Frequency of light decreases |
| Answer» D. Frequency of light decreases | |
| 7. |
What is the effective distance between the source of light and the screen in Fraunhofer Diffraction? |
| A. | Focal length of the convex lens |
| B. | Less than Focal Length of the convex lens |
| C. | Greater than the focal length of the convex lens and less than infinite |
| D. | Infinite |
| Answer» E. | |