(Solved): A green laser has a wavelength of 532 nm. A grating and a lens are used to split the beam into thr ...

A green laser has a wavelength of 532 nm. A grating and a lens are used to split the beam into three parallel beams spaced 1.85 cm apart. (a) What range of slit spacings can the grating have to produce three and only three beams? (b) If the slit spacing is 1.0 um, what focal length lens should be used?