Problem 4: A laser beam of wavelength is incident upon a narrow single slit of width W, with A < W, as shown in figure below. Assume |Ay| is the distance (in cm) between the two dark fringes (intensity minima), observed closest to the central maximum on a screen at a distance L on the other side of the slit. This distance Ay| will 1st dark fringes Ay Screen Fig. 2.28 Single Slit Laser Beam (A) increase if we decrease L (keeping A and W fixed). (B) decrease if we increase A (keeping L and W fixed). (C) increase if we decrease W (keeping A and L fixed). (D) decrease if we increase L (keeping A and W fixed). (E) increase if we decrease A (keeping L and W fixed).

Problem 4: A laser beam of wavelength is incident upon a narrow single slit of width W, with A < W, as shown in figure below. Assume |Ay| is the distance (in cm) between the two dark fringes (intensity minima), observed closest to the central maximum on a screen at a distance L on the other side of the slit. This distance Ay| will 1st dark fringes Ay Screen Fig. 2.28 Single Slit Laser Beam (A) increase if we decrease L (keeping A and W fixed). (B) decrease if we increase A (keeping L and W fixed). (C) increase if we decrease W (keeping A and L fixed). (D) decrease if we increase L (keeping A and W fixed). (E) increase if we decrease A (keeping L and W fixed).