MCQOPTIONS
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MCQOPTIONS
This section includes 14 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. |
In Young s Double Slit experiment, the angular width of the fringe is 0.1o. If the light used has a wavelength of 600 nm, what is the spacing between the slits? |
| A. | 0.17 mm |
| B. | 0.23 mm |
| C. | 0.34 mm |
| D. | 0.49 mm |
| Answer» D. 0.49 mm | |
| 2. |
The visibility of fringes is given by the expression ___________ |
| A. | l<sub>max</sub>/l<sub>min</sub> |
| B. | l<sub>min</sub>/l<sub>max</sub> |
| C. | l<sub>min</sub> + l<sub>max</sub> / l<sub>min</sub> l<sub>max</sub> |
| D. | l<sub>min</sub> l<sub>max</sub> / l<sub>min</sub> + l<sub>max</sub> |
| Answer» E. | |
| 3. |
When a plate of thickness 0.05 mm is placed in the path of a Michaelson Interferometer, a shift of 100 fringes is observed for a light of wavelength 5000 . What is the refractive index of the plate? |
| A. | 1 |
| B. | 1.5 |
| C. | 2 |
| D. | 2.5 |
| Answer» C. 2 | |
| 4. |
Two narrow and parallel slits 0.08 cm apart are illuminated by a light of frequency 6 X 1011 kHz. At what distance from the slits should the screen be placed to obtain fringe width of 0.6 mm? |
| A. | 0.98 m |
| B. | 1.06 m |
| C. | 1.28 m |
| D. | 1.74 m |
| Answer» D. 1.74 m | |
| 5. |
A Young s double slit apparatus is immersed in a liquid of refractive index 1.25. What is the ratio of the fringe width in air and liquid? |
| A. | 1: 2 |
| B. | 4: 5 |
| C. | 5: 4 |
| D. | 2: 1 |
| Answer» D. 2: 1 | |
| 6. |
A thin sheet of refractive index 1.25 and thickness 0.5 cm is placed in the path of light from one source in the Young s double slit experiment. What is the path difference observed? |
| A. | 1.25 mm |
| B. | 2.5 mm |
| C. | 2.78 mm |
| D. | 3.25 mm |
| Answer» B. 2.5 mm | |
| 7. |
In a Young s double slit experiment, the distance between the two slits is 0.5 mm and the distance between the screen and the slits is 1 m. When a light of wavelength 500 nm is incident on the slits, what would be distance between the two second bright fringes? |
| A. | 1 mm |
| B. | 2 mm |
| C. | 3 mm |
| D. | 4 mm |
| Answer» C. 3 mm | |
| 8. |
There is no effect on the interference pattern when the width of the slit is increased. |
| A. | True |
| B. | False |
| Answer» C. | |
| 9. |
In YDS, the width of the fringes obtained from a light of wavelength 500 nm is 3.6 mm. What is the fringe width id the apparatus is immersed in a liquid of refractive index 1.2? |
| A. | 2 mm |
| B. | 2.6 mm |
| C. | 3 mm |
| D. | 3.2 mm |
| Answer» D. 3.2 mm | |
| 10. |
What change is observed when the whole pattern is immersed in water? |
| A. | Fringe width decreases |
| B. | Fringe width increases |
| C. | Colored fringes |
| D. | The bright and dark fringes will change position |
| Answer» B. Fringe width increases | |
| 11. |
If the distance between the two slits is doubled, the fringe width _________ |
| A. | Doubles |
| B. | Halves |
| C. | Four-times |
| D. | Remains same |
| Answer» C. Four-times | |
| 12. |
What kind of sources are required for Young s Double Slit experiment? |
| A. | Coherent |
| B. | Incoherent |
| C. | Intense |
| D. | Bright |
| Answer» B. Incoherent | |
| 13. |
Young s Double Slit Experiment was conducted in ______________ |
| A. | 1802 |
| B. | 1889 |
| C. | 1925 |
| D. | 1930 |
| Answer» B. 1889 | |
| 14. |
In Young s Double Slit Experiment, if instead of monochromatic light white light is used, what would be the observation? |
| A. | The pattern will not be visible |
| B. | The shape of the pattern will change from hyperbolic to circular |
| C. | Colored fringes 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 | |