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. |
What will be the linear width of the central maximum on a screen that is kept 5 m away from the slit, if a light of wavelength 800 nm strikes a slit of 5 mm width. |
| A. | 1.2 mm |
| B. | 5.6 mm |
| C. | 6.5 mm |
| D. | 9.7 mm |
| Answer» B. 5.6 mm | |
| 2. |
Determine the half angular width of the central maximum, if a wavelength of 1000 nm is observed when diffraction occurs from a single slit of 2 m width. |
| A. | 100<sup>o</sup> |
| B. | 30<sup>o</sup> |
| C. | 90<sup>o</sup> |
| D. | 150<sup>o</sup> |
| Answer» C. 90<sup>o</sup> | |
| 3. |
Diffraction is common in light waves. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
Single slit diffraction is completely immersed in water without changing any other parameter. How is the width of the central maximum affected? |
| A. | Insignificant |
| B. | Increases |
| C. | Decreases |
| D. | Becomes zero |
| Answer» D. Becomes zero | |
| 5. |
A small circular disc is placed in the path of light from a distant source. Identify the nature of the fringe produced. |
| A. | Dual |
| B. | Narrow |
| C. | Dark |
| D. | Bright |
| Answer» E. | |
| 6. |
What should be the order of the size of an obstacle or aperture for diffraction light? |
| A. | Order of wavelength of light |
| B. | Order of wavelength of obstacle |
| C. | Order in ranges of micrometer |
| D. | Order in ranges of nanometer |
| Answer» B. Order of wavelength of obstacle | |
| 7. |
What is the cause of diffraction? |
| A. | Interference of primary wavelets |
| B. | Interference of secondary wavelets |
| C. | Reflection of primary wavelets |
| D. | Reflection of secondary wavelets |
| Answer» C. Reflection of primary wavelets | |
| 8. |
State the essential condition for diffraction of light to occur. |
| A. | The size of the aperture must be less when compared to the wavelength of light |
| B. | The size of the aperture must be more when compared to the wavelength of light |
| C. | The size of the aperture must be comparable to the wavelength of light |
| D. | The size of the aperture should not be compared to the wavelength of light |
| Answer» D. The size of the aperture should not be compared to the wavelength of light | |