Final answer:
The relationship between the laser wavelength, the angle of the bright fringe, and the diffraction grating spacing can be described by the equation α sin(θ) = mλ.
Step-by-step explanation:
The relationship between the laser wavelength λ, the angle θ of the mth bright fringe, and the diffraction grating spacing α can be described by the equation α sin(θ) = mλ. This equation is similar to the one for double slits, but the spacing between slits in a diffraction grating is usually smaller, resulting in fewer maxima at larger angles.