Electromagnetic wave

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% Author: Izaak Neutelings (May 2018)
% Inspiration: https://tex.stackexchange.com/questions/113900/draw-polarized-light
\documentclass[border=3pt,tikz]{standalone}
\usepackage{amsmath} % for \text
\usepackage{tikz}
\usepackage{physics}
\tikzset{>=latex} % for LaTeX arrow head
\usepackage{xcolor}
\colorlet{myblue}{black!40!blue}
\colorlet{myred}{black!40!red}
\colorlet{vcol}{green!50!black}
\colorlet{Ecol}{orange!90!black}
\colorlet{EVcol}{orange!80!black!60}
\colorlet{Bcol}{violet!90}
\begin{document}
% Electromagnetic wave - colored
\begin{tikzpicture}[x=(-15:0.9), y=(90:0.9), z=(-150:1.1),
                    line cap=round, line join=round,
                    axis/.style={black, thick,->},
                    vector/.style={>=stealth,->}]
  \large
  \def\A{1.5}
  \def\nNodes{5} % use even number
  \def\nVectorsPerNode{8}
  \def\N{\nNodes*40}
  \def\xmax{\nNodes*pi/2*1.01}
  \pgfmathsetmacro\nVectors{(\nVectorsPerNode+1)*\nNodes}
  \def\vE{{\color{Ecol}\mathbf{E}}}
  \def\vB{{\color{Bcol}\mathbf{B}}}
  
  \def\drawENode{ % draw E node and vectors with some offset
    \draw[Ecol,very thick,variable=\t,domain=\iOffset*pi/2:(\iOffset+1)*pi/2*1.01,samples=40]
      plot (\t,{\A*sin(\t*360/pi)},0);
    \foreach \k [evaluate={\t=\k*pi/2/(\nVectorsPerNode+1);
                           \angle=\k*90/(\nVectorsPerNode+1);}]
                in {1,...,\nVectorsPerNode}{
      \draw[vector,EVcol]  (\iOffset*pi/2+\t,0,0) -- ++(0,{\A*sin(2*\angle+\iOffset*180)},0);
 
 
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