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Units of Measurement Standard - This JSR specifies Java packages for modeling and working with measurement values, quantities and their corresponding units.

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/*
 * Units of Measurement API
 * Copyright (c) 2014-2023, Jean-Marie Dautelle, Werner Keil, Otavio Santana.
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions
 *    and the following disclaimer in the documentation and/or other materials provided with the distribution.
 *
 * 3. Neither the name of JSR-385 nor the names of its contributors may be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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 */
package javax.measure.quantity;

import javax.measure.Quantity;

/**
 * Luminous flux density per solid angle as measured in a given direction relative to the emitting source.
 * The metric system unit for this quantity is "cd" (candela).
 *
 * The candela, symbol cd, is the SI unit of luminous intensity in a given direction. It is
 * defined by taking the fixed numerical value of the luminous efficacy of
 * monochromatic radiation of frequency 540 × 10¹² Hz, Kcd, to be 683 when expressed
 * in the unit lm W−1, which is equal to cd sr W⁻¹, or cd sr kg⁻¹ m⁻² s³, where the kilogram,
 * metre and second are defined in terms of h, c and ∆νCs.
 *
 * This definition implies the exact relation Kcd = 683 cd sr kg⁻¹ m⁻² s³ for monochromatic
 * radiation of frequency ν = 540 × 10¹² Hz. Inverting this relation gives an exact expression
 * for the candela in terms of the defining constants Kcd, h and ∆νCs:
 *
 * 1 cd = (Kcd / 683) kg m² s⁻³ sr⁻¹
 * 

 * 
 * API Note:
SI Base Unit
 * 
 * 
 * @author Jean-Marie Dautelle
 * @author Werner Keil
 * @author Thodoris Bais
 * @version 2.1
 * @since 1.0
 * 
 * @see Wikipedia: Luminous intensity
 */
public interface LuminousIntensity extends Quantity {
}