Question

Date
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Refraction of Light
(10) What is the refraction?
Joe The direction of propagation of an obliquely incident say
of light that eňters the other medium, Changes at the
interface y the two media. This phenomenon is called
refraction of light.​

Answer 1

$\documentclass{article}</p><p>\usepackage[utf8]{inputenc}</p><p>\usepackage{tikz}</p><p>\usetikzlibrary{fit,shapes.geometric}</p><p>\begin{document}</p><p>\begin{tikzpicture}</p><p>\node[shape=circle, draw=black] (eh) at (-2,0) { E_H };</p><p>\node[shape=circle, draw=black] (ha) at (0,1) { I_{Ha} };</p><p>\node[shape=circle, draw=black] (hs) at (0,-1) { I_{Hs} };</p><p>\node[shape=circle, draw=black] (h) at (2,0) { R_H };</p><p>\node (mu) at (2,-0.75) { \mu_H };$

\node (bl) at (-2,-1.0) {};

$\path[thick,->] (eh) edge node[below,swap] {\small{ (1-\phi)\lambda_H }} (ha);</p><p>\path[thick,->] (eh) edge node[below,swap] {\small{ \phi\lambda_H }} (hs);</p><p>\path[thick,->] (ha) edge (h);</p><p>\path[thick,->] (hs) edge (h);</p><p>\path[dashed,->] (eh) edge node[right] { \mu_H } (bl);</p><p>\node[fit=(ha)(hs), ellipse, fill=blue, opacity=0.2] {};</p><p>\end{tikzpicture}</p><p>\end{document}$