#! /usr/bin/env python
# -*- coding: UTF-8 -*-

""" PyRifrations, simulatore di rifrazione  in python creato da
                  Eu (thefox.eu@gmail.com)
    col contributo di Frafra (francesco.it@gmail.com)


    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    GNU General Public License for more details.
"""  

__module_name__ = "PyRifrations"
__module_version__ = "0.2"
__module_description__ = "Simula la rifrazione della luce"

from math import asin, pi, sin

print "PyRifrations"
a = input("Angolo di indicidenza > ")
n1 = float(raw_input("Indice di rifrazione mezzo 1 > "))
n2 = float(raw_input("Indice di rifrazione mezzo 2 > "))
n = n2 / n1
print "\nIndice di rifrazione (2->1):", n
lrad = (asin(1/n1))
l = (lrad*180)/pi
print l
if a < l:
    rada= (a * pi)/180
    sinr =  sin(rada)/n
    rr = asin(sinr)
    r = (rr*180)/pi
    print "Angolo di Rifrazione:", r
else:
    print "Riflessione totale"