001/*
002 * Units of Measurement API
003 * Copyright (c) 2014-2021, Jean-Marie Dautelle, Werner Keil, Otavio Santana.
004 *
005 * All rights reserved.
006 *
007 * Redistribution and use in source and binary forms, with or without modification,
008 * are permitted provided that the following conditions are met:
009 *
010 * 1. Redistributions of source code must retain the above copyright notice,
011 *    this list of conditions and the following disclaimer.
012 *
013 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions
014 *    and the following disclaimer in the documentation and/or other materials provided with the distribution.
015 *
016 * 3. Neither the name of JSR-385 nor the names of its contributors may be used to endorse or promote products
017 *    derived from this software without specific prior written permission.
018 *
019 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
020 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
021 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
022 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
023 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
024 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
025 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
026 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
027 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
028 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
029 */
030package javax.measure.quantity;
031
032import javax.measure.Quantity;
033
034/**
035 * Extent of something along its greatest dimension or the extent of space between two objects or places.
036 * The metric system unit for this quantity is "m" (metre).
037 *
038 * The metre, symbol m, is the SI unit of length. It is defined by taking the fixed
039 * numerical value of the speed of light in vacuum c to be 299 792 458 when expressed
040 * in the unit m s⁻¹, where the second is defined in terms of the caesium frequency
041 * ∆νCs.
042 *
043 * This definition implies the exact relation c = 299 792 458 m s⁻¹. Inverting this relation
044 * gives an exact expression for the metre in terms of the defining constants c and ∆νCs:
045 *
046 * 1 m = (c / 299 792 458)s = 9 192 631 770 c / 299 792 458 ∆νCs ≈ 30.663 319 c / ∆νCs
047 * <br>
048 * <dl>
049 * <dt><span class="strong">API Note:</span></dt><dd>SI Base Unit</dd>
050 * </dl>
051 * 
052 * @author <a href="mailto:jean-marie@dautelle.com">Jean-Marie Dautelle</a>
053 * @author <a href="mailto:werner@uom.technology">Werner Keil</a>
054 * @author <a href="mailto:thodoris.bais@gmail.com">Thodoris Bais</a>
055 * @version 2.1
056 * @since 1.0
057 * 
058 * @see <a href="https://en.wikipedia.org/wiki/Length">Wikipedia: Length</a>
059 * @see Area
060 * @see Volume
061 * @see Angle
062 * @see SolidAngle
063 * @see Speed
064 */
065public interface Length extends Quantity<Length> {
066}