From 7d956ff811dff11fdbd74bdeeca744877d9afd1e Mon Sep 17 00:00:00 2001 From: eggy Date: Wed, 16 Dec 2020 17:05:41 -0500 Subject: [PATCH] phys: clarify s in light --- docs/sph3u7.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/sph3u7.md b/docs/sph3u7.md index 42a8028..6e95991 100644 --- a/docs/sph3u7.md +++ b/docs/sph3u7.md @@ -717,7 +717,7 @@ A light wave that is **coherent** is **monochromatic** (of the same wavelength) (Source: Kognity) -By using mafs involving rays along a nodal line, the separation, $s$ between **bright fringes** can be related to the distance from the slits to the screen, $D$, the separation between the slits, $d$, and the wavelength $\lambda$. +By using mafs involving rays along a nodal line, the separation, $s$ between **nodal/anti-nodal** lines on the distant surface can be related to the distance from the slits to the screen, $D$, the separation between the slits, $d$, and the wavelength $\lambda$. $$s=\frac{\lambda D}{d}$$ **Dark fringe** positions on the screen are equally spaced at the same separation $s$ between the bright fringes. The perpendicular bisector with a length of $D$ is a **bright fringe**.