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316def4ea6
* Add Snell's Law implementation for refraction angle * Add tests for Snell's Law calculations * Update documentation with reference link to Snell's Law Added a reference link to Snell's Law in the documentation. * Prevent instantiation of SnellLaw class Make SnellLaw class non-instantiable by adding a private constructor. * Rename SnellsLawTest to SnellLawTest * Refactor SnellLawTest for clarity and accuracy * Rename SnellsLaw.java to SnellLaw.java * Refactor SnellLawTest with additional assertions * Refactor SnellLaw class constructor and error handling Refactor SnellLaw constructor and error message formatting. * Fix missing newline at end of SnellLawTest.java Ensure that the SnellLawTest class has a newline at the end of the file. * Simplify assertions in SnellLawTest * Simplify exception throwing for total internal reflection
34 lines
1.0 KiB
Java
34 lines
1.0 KiB
Java
package com.thealgorithms.physics;
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/**
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* Calculates refraction angle using Snell's Law:
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* n1 * sin(theta1) = n2 * sin(theta2)
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* @see <a href="https://en.wikipedia.org/wiki/Snell%27s_law">Snell's Law</a>
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*/
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public final class SnellLaw {
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private SnellLaw() {
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throw new AssertionError("No instances.");
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}
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/**
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* Computes the refracted angle (theta2) in radians.
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*
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* @param n1 index of refraction of medium 1
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* @param n2 index of refraction of medium 2
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* @param theta1 incident angle in radians
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* @return refracted angle (theta2) in radians
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* @throws IllegalArgumentException if total internal reflection occurs
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*/
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public static double refractedAngle(double n1, double n2, double theta1) {
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double ratio = n1 / n2;
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double sinTheta2 = ratio * Math.sin(theta1);
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if (Math.abs(sinTheta2) > 1.0) {
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throw new IllegalArgumentException("Total internal reflection: no refraction possible.");
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}
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return Math.asin(sinTheta2);
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}
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}
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