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NEET UG PHYSICS MCQ: WAVE OPTICS
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Medium
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Analyzing
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Statement A: In Fraunhofer diffraction central observation point is always bright where as in Fresnel diffraction observation point may bright or dark.
Statement B: In Fresnel light waves approaches at observation point are always in same phase, whereas in Fraunhofer light waves approaches at central observation point may be in same phase or in opposite phase.
Statement B: In Fresnel light waves approaches at observation point are always in same phase, whereas in Fraunhofer light waves approaches at central observation point may be in same phase or in opposite phase.
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Correct option: C
A is correct and B is wrong
Option C (A is correct and B is wrong) is correct. In Fraunhofer diffraction, the central observation point is always bright. In Fresnel diffraction, it can be bright or dark. In Fresnel diffraction, the light waves arriving at the observation point are not always in the same phase.
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