The wavelength of monochromatic light is determined using a diffraction grating, as the diagram illustrates. The slit separation in the grating is $1.00 \times 10^{-6}\,\text{m}$. The separation between the first-order diffraction maxima is $70.0^{\circ}$. What is the wavelength of the light?
- A287 nm
- B470 nm
- C574 nm
- D940 nm