using System;

namespace Science.Physics.GeneralPhysics
{
	/// <summary>
	/// Optics
	/// </summary>
	public class Optics
	{
		public Optics()
		{			
		}
		private double theta1, theta2, theta3, thetac, thetap, theta, thetamin; // radian
		private double n1 = 1.0, n2, d, y, L, lambda, D;
		private int m = 1;
		public double AngleOfIncidence
		{
			get{return theta1;}
			set{theta1 = value;}
		}
		public double AngleOfReflection
		{
			get{return theta2;}
			set{theta2 = value;}
		}
		public double AngleOfRefraction
		{
			get{return theta3;}
			set{theta3 = value;}
		}
		public void Reflection()
		{
			theta2 = theta1;
		}
		public void RefractionOfSnellLaw()
		{
			theta3 = Math.Asin(n1/n2*Math.Sin(theta1));
		} 
		public double IndexOfRefractionForMedium1
		{
			get{return n1;}
			set{n1 = value;}
		}
		public double IndexOfRefractionForMedium2
		{
			get{return n2;}
			set{n2 = value;}
		}
		public void FindIndexOfRefractionForMedium2()
		{
			n2 = n1*Math.Sin(theta1)/Math.Sin(theta3);
		}
		public void TotalInternalReflection()
		{
			thetac = Math.Asin(n2/n1);
		}
		public double CriticalAngle
		{
			get{return thetac;}
			set{thetac = value;}
		}
		public void PolarizationOfBrewsterLaw()
		{
			thetap = Math.Atan(n2/n1);
		}
		public double BrewsterAngle
		{
			get{return thetap;}
			set{thetap = value;}
		}
		public double AngleOfLine
		{
			get{return theta;}
			set{theta = value;}
		}
		public double DistanceOfFringe
		{
			get{return y;}
			set{y = value;}
		}
		public double DistanceToScreen
		{
			get{return L;}
			set{L = value;}
		}
		public double DistanceOfSlitSeperation
		{
			get{return d;}
			set{d = value;}
		}
		public int OrderNumber 
		{
			get{return m;}
			set{m = value;}
		}
		public double WaveLength
		{
			get{return lambda;}
			set{lambda = value;}
		}
		public void FindWaveLengthInYoungExperiment()
		{
			lambda = y*d/L/(double)m;
		}
		public void FindFringeInYoungExperiment()
		{
			y = L*Math.Asin(m*lambda/d);
		}
		public void FindAngleInGratingDiffraction()
		{
			theta = Math.Asin(m*lambda/d);
		}
		public double WaveLengthInMedium
		{
			get{return lambda/n1;}
		}
		public double SpeedOfLightInMedium
		{
			get{return Constant.SpeedOfLightInVacuum/n1;}
		}
		public void ResolutionOfCircularAperture()
		{
			thetamin = 1.22*lambda/D;
		}
		public double MinimumAngleOfResolution 
		{
			get{return thetamin;}
			set{thetamin = value;}
		}
		public double DiameterOfAperture
		{
			get{return D;}
			set{D = value;}
		}
	}
}