Two single-slit experiments use the same 500 nm laser but different slit widths
PHYSICS · Single correct · A Level · Physics · Waves · Waves
Problem
Two single-slit experiments use the same 500 nm laser but different slit widths. In Experiment 1 the slit width is a1=0.10 mm and in Experiment 2 it is a2=0.05 mm. All other conditions are identical. Which statement about the angular width of the central diffraction maximum is most accurate?
(a) The central maximum in Experiment 2 is half as wide as in Experiment 1.
(b) Both experiments produce central maxima of equal width because they use the same wavelength.
(c) The central maximum in Experiment 2 is twice as wide as in Experiment 1.
(d) The comparison cannot be determined without knowing the screen distance.