When the problem or conditions, for example, does not allow controlled experiments in astronomy research, observational study may be useful. For example, Tycho Brahe carefully observe and records of measuring stars and planets, and over time, the theoretical support of Copernicus Brahe denial of hypothesis. After his death, Brahe extremely useful measure in the development [...]

Continue reading...

- most support in his book, he’s theory of optical and grounding, light and color vision, and his research, dioptrics catoptrics. His heritage is through “transformation” al – Farisi – by al Din optical (d), Kamal of differential Kitab Tanqih al – Manazir (revised) [ibn al Haytham – the optical).This speculation “in a straight line [...]

Continue reading...

Father of the modern optical “. [9] he test and math scores in his book the optical (1021.) [8] he combination observation and rational argument, intromission to support his theory, in view of the light is emitted, rather than from the eyes. He also indicated that the ancient launch theoretical support and Euclid ptolemaic (i.e., [...]

Continue reading...

Observe the moons of Jupiter appearance when Jupiter is delayed a little far from earth, rather than when Jupiter close to the earth, this kind of phenomenon is used to display different time is consistent with a moderate speed.In economics, one always game show is natural experiment. When the game show might look like man-made [...]

Continue reading...

Experiment. Generally, however, there is some relation, thus reducing the reliability of these variables such as a test relative natural control experiments were performed. At the same time, because the natural laboratory commonly occurs in the control variables, the source from the environment, neither were measured under the condition of invariable, also can produce false [...]

Continue reading...

All the data were collected. This ensures that no effect because of the volunteers are treated itself is not responded to say, he is to be treated.In human trials, an entity (person) may stimulate his or her should respond. The aim of the experiment is to measure the response of a given by stimulating the [...]

Continue reading...

Line of illustration), to determine the protein in unknown sample estimates.Control experiments can be difficult to fully control in an experiment in all conditions. In this case, the experiment begins to create two or more than two probability sample equivalent, which means that the characteristic of measurement in groups and organizations should be in the [...]

Continue reading...

Conditions, confirmed the experiment can produce positive effects, even without the actual test sample produce positive effects. Negative contrasts demonstrates the baseline examination results have not resulted in significant achievement value. Often negative contrasts as “background” value minus the test sample results. Sometimes active management of quadrant as standard curve.An example is often used in [...]

Continue reading...

With variable added.Displays a cause and effect hypothesis, an experimental, frequent occurrence, for example, gives some after treatment, for a problem, this phenomenon and didn’t appear in no treatment.A control experiment results of experimental samples and control is usually almost the same, except for a sample test samples by testing the role of independent (.). [...]

Continue reading...

In any scientific discovery.””Science is long against fraud by security mechanism: generally accepted, experimental must repeat others.”It is very important that you know all the factors, in an experiment. It is also important results are as accurate as possible. If an experimental result, the careful support or negative usually hypothesis. A “proof” experimental cannot hypothesis, [...]

Continue reading...