[填空题]
A parallel beam of light from a Hv6w0r hdoh6 f1e-Ne laser, with a1)cf7g0x r 4sxhj9kt e wavelength 656 nm, falls on two very narrow slits 0.060 mm apart. How far apart are the fringes in)xh9r4xg f0 j17kstce the center of the pattern on a screen 3.6 m away? cm
