This experiment was done by student called Stanley Miller and his professor Harold Urey in 1953 A.D in support of Opain's theory. They did this experiment number of times in their laboratory by creating condition found in primitive atmosphere of the earth.
Experiment : Their apparatus mainly consist of glass-tube and flask. There were two
chambers- gas chamber and water chamber. Water was heated in water chamber to
produced water vapour that circulated through the glass tube which acted as source
of for the gases kept in the gas chamber. Gas that were found in primitive atmosphere
of the earth like NH 3 , CO 2 , H 2 O, H 2 were kept in the gas chamber.
Electrode was fitted in the gas chamber to produce electric discharge. Condenser
was fitted below the gas chamber to cool the products. They left this
experiment for a weak.
Observation : After a week they condensed the product formed and analyzed
it. There found formation of sugar, fatty acid, and amino acid like alanine and
glycine.
Conclusion : From this experiment they concluded that in the primitive atmosphere of the earth in presence of heat from extreme temperature of the earth, electric discharge from lighting and uv rays from sun the element like NH 3 , CO 2 , H 2 O, H 2 combined to form sugar, fatty acid, and amino acid.
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