💿🐜 Antkeeper source code
https://antkeeper.com
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90 lines
2.5 KiB
90 lines
2.5 KiB
/*
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* Copyright (C) 2021 Christopher J. Howard
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*
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* This file is part of Antkeeper source code.
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*
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* Antkeeper source code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Antkeeper source code is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef ANTKEEPER_PHYSICS_LIGHT_BLACKBODY_HPP
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#define ANTKEEPER_PHYSICS_LIGHT_BLACKBODY_HPP
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#include "math/constants.hpp"
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#include "physics/constants.hpp"
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#include "physics/planck.hpp"
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namespace physics {
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namespace light {
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/**
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* Blackbody radiation functions.
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*/
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namespace blackbody {
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/**
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* Calculates the radiant exitance of a blackbody.
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*
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* @param t Temperature of the blackbody, in kelvin.
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* @return Radiant exitance of the blackbody, in watt per square meter.
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*
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* @see https://en.wikipedia.org/wiki/Stefan%E2%80%93Boltzmann_law
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* @see https://en.wikipedia.org/wiki/Radiant_exitance
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*/
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template <class T>
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T radiant_exitance(T t);
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/**
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* Calculates the radiant flux of a blackbody.
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*
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* @param t Temperature of the blackbody, in kelvin.
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* @param a Surface area of the blackbody, in square meters.
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* @return Radiant power of the blackbody, in watts.
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*
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* @see https://en.wikipedia.org/wiki/Stefan%E2%80%93Boltzmann_law
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*/
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template <class T>
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T radiant_flux(T t, T a);
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/**
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* Calculates the spectral radiance of a blackbody at a given wavelength.
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*
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* @param t Temperature of the blackbody, in kelvin.
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* @param lambda Wavelength of light, in meters.
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* @param c Speed of light in medium.
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* @return Spectral radiance, in watt per steradian per square meter per meter.
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*
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* @see physics::planck::wavelength
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*/
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template <class T>
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constexpr auto spectral_radiance = planck::wavelength<T>;
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template <class T>
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T radiant_exitance(T t)
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{
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const T tt = t * t;
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return constants::stefan_boltzmann<T> * (tt * tt);
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}
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template <class T>
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T radiant_flux(T t, T a)
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{
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return a * radiant_exitance(t);
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}
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} // namespace blackbody
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} // namespace light
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} // namespace physics
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#endif // ANTKEEPER_PHYSICS_LIGHT_BLACKBODY_HPP
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