Light of wavelength 6.3 × 10-7 m is used in a Young's double-slit experiment. The distance from the slits to the screen is 2.0 m. The width of twelve fringes is 5.4 cm. What is the separation of the two slits?
2.3×10−5 m2.3 \times 10^{-5}\text{ m}2.3×10−5 m
1.4×10−4 m1.4 \times 10^{-4}\text{ m}1.4×10−4 m
2.8×10−4 m2.8 \times 10^{-4}\text{ m}2.8×10−4 m
5.6×10−4 m5.6 \times 10^{-4}\text{ m}5.6×10−4 m
