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Engelmann shone light of different colores (wavelengths) onto filaments of Spirogyra. Spirogyra is an alga made up of filaments (chains) of cells. He added motile bacteria (which could swim) and which needed oxygen and observed where they went. He found that the bacteria clustered around the blue and red colours of the spectrum, where the Spirogyra were producing the most oxygen. So he concluded that these two colours were the most important for photosynthesis. For an animation of his experiment see: http://www.phschool.com/science/biology_place/biocoach/photosynth/action.html See also: http://en.wikipedia.org/wiki/Theodor_Wilhelm_Engelmann
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What gas is represented by bubbles in an experiment?
Which experiment?
In a scientific experiment a control is the part of the experiment that?
In a scientific experiment, a control is the part of the experiment that remains constant and is used as a baseline to compare against the experimental group. It helps researchers determine the effect of the variable being tested in the experiment.
A scientist who performs an experiment has no idea what the outcome of the experiment is going to be true or false?
True. In an experiment, a scientist formulates a hypothesis, designs the experiment, collects data, and then analyzes the results to draw conclusions. The outcome of the experiment is not known beforehand, and it is the results of the experiment that will either support or refute the hypothesis.
What increases the validity of an experiment?
Repeated trials of said experiment.
What is one word for a test using scientific methods?
experiment
Was thomas Edison's first eperiment a success or a failure?
Thomas Edison's first experiment was a failure. He attempted to create a telegraph repeater, but it did not work as intended. This failure motivated him to continue experimenting and eventually led to many successful inventions.
When did Thomas Edison do his first experiment?
hahahaha i cant believe u looked at this question
Who was the first person to prove that light was a wave?
Thomas Young was the first person to offer evidence that light was a wave through his famous double-slit experiment in 1801. This experiment demonstrated light's wave-like behavior through interference patterns.
What has the author Thomas Johansen written?
Thomas Johansen has written: 'An experiment with oral transmission' -- subject(s): Folklore, Oral tradition, Devil, Classification, Uncles '70 opgaver i katalogisering'
How did thompsons experiment change daltons atomic model?
thomas discovered that the atom contained smaller particals called electrons
What has the author Thomas H Barr written?
Thomas H. Barr has written: 'Vector calculus' -- subject(s): Vector analysis 'Naval Warfare Analysis Experiment' -- subject(s): Management 'Multivariable calculus'
What actors and actresses appeared in A Novel Experiment - 1911?
The cast of A Novel Experiment - 1911 includes: Thomas Carrigan Rex De Rosselli Winifred Greenwood Fred Herzog Adrienne Kroell Leighton Stark Otis Thayer
Who is the scientist who proposed that light is a wave?
Thomas Young is the scientist who proposed in 1801 that light is a wave, using his double-slit experiment to support this theory.
What was Thomas Edison's first experiment?
Thomas Edison's first major invention was the phonograph, patented in 1878. He had previously worked on various telegraph-related projects, but the phonograph marked his entry into the field of audio technology.
Who invented the electric power station?
Thomas Edison invented the first electric power plant.
Did Thomas Edison do an experiment that turned on lights with no visible wire connections?
He might have, but that sort of thing sounds more like something Nikola Tesla would be involved with.
How did Thomas Edison burn down his barn?
It is believed that Thomas Edison's barn burned down due to a cauldron experiment he was conducting in the barn. The experiment involved attempting to extract rubber from goldenrod plants, which led to a fire. Despite the barn burning down, Edison reportedly viewed it as a learning experience and rebuilt the facility as a research laboratory.
