Optimize and improve naming of all images in knowledge base

1 files changed, 3 insertions, 7 deletions

diff --git a/source/know/concept/step-index-fiber/index.md b/source/know/concept/step-index-fiber/index.md
index dd83334..c0c95d1 100644
--- a/source/know/concept/step-index-fiber/index.md
+++ b/source/know/concept/step-index-fiber/index.md
@@ -240,14 +240,12 @@ $$\begin{aligned}
     \end{cases}
 \end{aligned}$$
 
-<a href="bessel.jpg">
-<img src="bessel-small.jpg" style="width:100%">
-</a>
+{% include image.html file="bessel-full.png" width="100%" alt="First few solutions to Bessel's equation" %}
 
 Looking at these solutions with our constraints for $$R_o$$ in mind,
 we see that for $$\mu > 0$$ none of the solutions decay
 *monotonically* to zero, so we must have $$\mu \le 0$$ in the cladding.
-Of the remaining candidates, $$\ln\!(r)$$, $$r^\ell$$ and $$I_\ell(\rho)$$ do not decay at all,
+Of the remaining candidates, $$\ln(r)$$, $$r^\ell$$ and $$I_\ell(\rho)$$ do not decay at all,
 leading to the following $$R_o$$:
 
 $$\begin{aligned}
@@ -394,9 +392,7 @@ An example graphical solution of the transcendental equation
 is illustrated below for a fiber with $$V = 5$$,
 where red and blue respectively denote the left and right-hand side:
 
-<a href="modes.jpg">
-<img src="modes-small.jpg" style="width:100%">
-</a>
+{% include image.html file="transcendental-full.png" width="100%" alt="Graphical solution of transcendental equation" %}
 
 This shows that each $$\mathrm{LP}_{\ell m}$$ has an associated cut-off $$V_{\ell m}$$,
 so that if $$V > V_{\ell m}$$ then $$\mathrm{LP}_{lm}$$ exists,