All Problems

Diffraction of Light

Problem 5.123

A monochromatic beam falls on a reflection grating with period \(d=1.0 \mathrm{~mm}\) at a glancing angle \(\alpha_{0}=1.0^{\circ} .\) When it is diffracted at a glancing angle \(\alpha=3.0^{\circ}\) a Fraunhofer maximum of second order occurs. Find the wavelength of light.

Reveal Answer
λ≈(α2−α02)d/2k=0.6μm\lambda \approx\left(\alpha^{2}-\alpha_{0}^{2}\right) d / 2 k=0.6 \mu \mathrm{m}
Prev
Next