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प्रश्न
Differentiate between Fresnel and Fraunhofer diffraction.
उत्तर
| S.No. | Fresnel diffraction | Fraunhofer diffraction |
| 1. | Spherical or cylindrical wavefront undergoes diffraction | Plane wavefront undergoes diffraction |
| 2. | Light wave is from a source at a finite distance | Light wave is from a source at infinity |
| 3. | For laboratory conditions, convex lenses need not be used | In laboratory conditions, convex lenses are to be used |
| 4. | Difficult to observe and analyse | Easy to observe and analyse |
| 5. |  |
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