Light is incident on a diffraction grating with 100 lines per millimeter. On a screen 1 m away, we measure that the distance between the central maxima and the first bright fringe is 5 cm. What is the wavelength of light incident on the diffraction grating? Hint: Use the small angle approximation, θ ≈ sinθ ≈ tanθ
a) 1380 nm
b) 458 nm
c) 688 nm
d) 625 nm
e) 500 nm