[单选题]
A monochromatic beam of light is incident on a double slit)x a7lf8du8e p arran6/q . mgj u)aq.ojgye.gement where the slit separao mujqaqyj. 6g.)g e./tion is $9.0\times10^{−5}\,m$ and the slit-screen distance is 1.0m. The graph below shows the relative intensity of the light reaching the screen with respect to the distance from the central point of the pattern.
What is the wavelength of the light?
A. $9.0\times10^{−7}\,m$
B. $3.0\times10^{−7}\,m$
C. $4.5\times10^{−5}\,m$
D. $4.5\times10^{−7}\,m$
