Question

In the experiment of diffraction at a single slit, if the slit width is decreased, the width of the central maximum

• A. decreases in both Fresnel and Fraunhoffer diffraction
• B. increases in both Fresnel and Fraunhoffer diffraction
• C. decreases in Fresnel diffraction but increases in Fraunhoffer diffraction
• D. increases in Fresnel diffraction but decreases in Fraunhoffer diffraction

Answer 1

Answer: (A)

decreases in both Fresnel and Fraunhoffer diffraction

Answer 2

Decreases in Fresnel diffraction but increases is Fraunhoffer diffraction