A [[Diffraction]] grating is when a wave both [[Wave Interference|constructivly and destructively]] interferes with itself when a incient plane [[Wave|wave]] hits a grating of many small holes. $\huge d \sin \theta = m\lambda $ This constructive interference for every integer multiple $m$ leads to bands of brightness of different orders. >[!multi-column] >>[!blank-container] >>![[Pasted image 20251103135819.png|invert_Sepia]] > >>[!blank-container] >>![[Pasted image 20251103135942.png|invert_S]]