MCQOPTIONS
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MCQOPTIONS
This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The speed of yellow light in a certain liquid is 2.4 108 m/s. Find the refractive index of the liquid. |
| A. | 1.25 |
| B. | 5.55 |
| C. | 6.25 |
| D. | 12.25 |
| Answer» B. 5.55 | |
| 2. |
The speed of light in air is 3 108 m/s. If the refractive index of glass is 1.5, find the time taken by light to travel a distance of 10 cm in the glass. |
| A. | 0.5 10<sup>-10</sup> s |
| B. | 5 10<sup>-10</sup> s |
| C. | 50 10<sup>-10</sup> s |
| D. | 500 10<sup>-10</sup> s |
| Answer» C. 50 10<sup>-10</sup> s | |
| 3. |
In Huygens theory, light waves are longitudinal and do not require a material medium for their propagation. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
The refractive index of glass is 1.5 and that of water is 1.3, the speed of light in water is 2.25 108 m/s. What is the speed of light in glass? |
| A. | 7.95 10<sup>8</sup> m/s |
| B. | 9.95 10<sup>8</sup> m/s |
| C. | 1.95 10<sup>8</sup> m/s |
| D. | 3.95 10<sup>8</sup> m/s |
| Answer» D. 3.95 10<sup>8</sup> m/s | |
| 5. |
The absolute refractive indices of glass and water are ( frac {3}{2} ) and ( frac {4}{3} ). Determine the ratio of the speeds of light in glass and water. |
| A. | 5:7 |
| B. | 9:8 |
| C. | 7:5 |
| D. | 8:9 |
| Answer» E. | |
| 6. |
Identify the condition which is not necessary for two light waves to be coherent. |
| A. | The two waves must be continuous |
| B. | The two waves should be of the same frequency or wavelength |
| C. | They should have a constant or zero phases difference |
| D. | They two light sources should be narrow |
| Answer» E. | |
| 7. |
The optical path of monochromatic light is the same if it travels 2 cm thickness of glass or 2.25 cm thickness of water. If the refractive index of water is 1.33, what is the refractive index of glass? |
| A. | 2.5 |
| B. | 1.5 |
| C. | 3.5 |
| D. | 4.5 |
| Answer» C. 3.5 | |
| 8. |
Which among the following isn t a suitable phenomenon to establish that light is wave motion? |
| A. | Interference |
| B. | Diffraction |
| C. | Reflection |
| D. | Polarization |
| Answer» D. Polarization | |