How does the angular separation between frings in single-slit diffraction experiment change when the distance of separation between the slit and screen is doubled ?

How does the angular separation between frings in single-slit diffract

1.	How does the angular separation between frings in single-slit diffraction experiment change when the distance of separation between the slit and screen is doubled ?
Answer» The angular width of central diffraction band `=(2lamda)/(a)alpha=(1)/(a).` When slit width is doubled the width of central band becomes half of the initial value. As intensity of central maximum `alphaa^(2)`, if slit width is doubled, the intensity become four times.

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How does the angular separation between frings in single-slit diffraction experiment change when the distance of separation between the slit and screen is doubled ?

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