A) decreases in Fresnels diffraction but increases in Fraun hofer diffraction
B) increases in Fresnels diffraction but decreases in Fraun hofer diffraction
C) decreases in both Fresnel and Fraun hofer diffraction
D) increases in both Fresnel and Fraun hofer diffraction
Correct Answer: D
Solution :
In the experiment of diffraction at a single slit, if the slit width is decreased, the width of the central maximum increases in both Fresnal and Fraunhofer diffraction.
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