Question

light of wavelength 687 nm is incident on a single slit 0.75 mm wide at what distance from the slit should a screen

Answer 1

Explanation:

The wavelength of light λ=687 nm.

width of the slit, w=0.75 mm.

The diffraction formula for single slit diffraction is;

$Sin\theta=\frac{m\lambda}{w}$

m here is an integer.

For small θ, sinθ≅ θ.

The formula changes to;

$\theta=\frac{m\lambda}{w}$.

The data in the question is missing. However, one put data in the above formula to find the unknown.