MCQOPTIONS
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MCQOPTIONS
This section includes 15 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. | lmax/lmin |
| B. | lmin/lmax |
| C. | lmin + lmax / lmin – lmax |
| D. | lmin – lmax / lmin + lmax |
| 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 Å. 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. |
The following intensity variation is observed in a Young’s Double Slit Experiment. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
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 | |
| 7. |
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 | |
| 8. |
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 | |
| 9. |
There is no effect on the interference pattern when the width of the slit is increased. |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
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 | |
| 11. |
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 | |
| 12. |
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 | |
| 13. |
What kind of sources are required for Young’s Double Slit experiment? |
| A. | Coherent |
| B. | Incoherent |
| C. | Intense |
| D. | Bright |
| Answer» B. Incoherent | |
| 14. |
Young’s Double Slit Experiment was conducted in ______________ |
| A. | 1802 |
| B. | 1889 |
| C. | 1925 |
| D. | 1930 |
| Answer» B. 1889 | |
| 15. |
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 | |