MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If the separation between the two slits is decreased in Young’s double-slit experiment keeping the screen position fixed, what will happen to the width of the fringe? |
| A. | Decreases |
| B. | Increases |
| C. | Remains the same |
| D. | Independent |
| Answer» C. Remains the same | |
| 2. |
In Young’s double-slit experiment if the distance between two slits is halved and distance between the slits and the screen is doubled, then what will be the effect on fringe width? |
| A. | Doubled |
| B. | Decreases four times |
| C. | Increases four times |
| D. | Halved |
| Answer» D. Halved | |
| 3. |
What would be the resultant intensity at a point of constructive interference, if there are two identical coherent waves of intensity I’ producing an interference pattern? |
| A. | 4 I’ |
| B. | 0 |
| C. | I’ |
| D. | 2 I’ |
| Answer» B. 0 | |
| 4. |
What will be the effect on the fringes formed in Young’s double-slit experiment if the apparatus is immersed in water? |
| A. | Increases |
| B. | Decreases |
| C. | Remains the same |
| D. | Independent |
| Answer» C. Remains the same | |
| 5. |
Two independent light sources act as coherent sources’. |
| A. | True |
| B. | False |
| Answer» C. | |
| 6. |
What happens to the interference pattern if the phase difference between the two sources varies continuously? |
| A. | Brightens |
| B. | No change |
| C. | Disappears |
| D. | Monochromatic pattern |
| Answer» D. Monochromatic pattern | |
| 7. |
What would be the resultant intensity at a point of destructive interference, if there are two identical coherent waves of intensity I0 producing an interference pattern? |
| A. | 5 I0 |
| B. | 2 I0 |
| C. | I0 |
| D. | zero |
| Answer» E. | |
| 8. |
In Young’s double-slit experiment, the two parallel slits are made one millimeter apart and a screen is placed one meter away. What is the fringe separation when blue-green light of wavelength 500 nm is used? |
| A. | 0.5 mm |
| B. | 50 mm |
| C. | 0.25 mm |
| D. | 25 mm |
| Answer» B. 50 mm | |
| 9. |
In Young’s double-slit experiment, lights of green, yellow, and orange colors are successively used. Write the fringe widths for the three colors in increasing order. |
| A. | βG < βY < βO |
| B. | βO < βY < βG |
| C. | βO < βG < βY |
| D. | βY < βG < βO |
| Answer» C. βO < βG < βY | |
| 10. |
In Young’s double-slit experiment with monochromatic light, how is fringe width affected, if the screen is moved closer to the slits? |
| A. | Independent |
| B. | Remains the same |
| C. | Increases |
| D. | Decreases |
| Answer» D. Decreases | |