Explanation:
The wavelength of light λ=687 nm.
width of the slit, w=0.75 mm.
The diffraction formula for single slit diffraction is;
[tex]Sin\theta=\frac{m\lambda}{w}[/tex]
m here is an integer.
For small θ, sinθ≅ θ.
The formula changes to;
[tex]\theta=\frac{m\lambda}{w}[/tex].
The data in the question is missing. However, one put data in the above formula to find the unknown.
