Many of us an idea of the energy already we knew in school, a basic principle of physics govern every part of our so-called "Law Save / Conserving study energy," and that energy can not be created from scratch or go away and is only transferred from one form to another.
We observe this principle and firmly installed in the heat that makes a cup of warm coffee in a chemical reaction that produces oxygen in the leaves of trees and in the Earth's orbit around the sun and even in the food we eat, which makes our hearts come to life. We can not live without food, cars do not move without fuel, where the idea of machines that do not stop the movement is just a mirage. When it seems to us that the experiment violated the law of conservation of energy, then question the validity. What will happen when we ask our findings lead to the existence of the idea of contradiction more established things in physics is energy conservation.
To turn a blind eye, even for a moment on our planet and to consider what is happening outside the immensity of the universe, most of our knowledge of outer space came in the form of light and one of the basic properties of light is that it tends to a red color as a result of expansion waves of electromagnetism, when traveling from distant galaxies across the universe the expanding continuously without interruption, according to the theory of Albert Einstein in general relativity, but when increasing the wavelength (low frequency and the color red has the lowest frequency in the light) Fniz low energy and here our mind curious will present the following question: "When you tend the light to the color red as a result of expansion of the universe where permission to go energy? is the loss of so inconsistent with the law of conservation mentioned?
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