J.J. Thompson
J.J Thomson conducted the cathode-ray tube experiment in 1911.
A test tube experiment is commonly referred to as an "in vitro" experiment. This means that the experiment is conducted outside a living organism or natural setting, typically in a controlled laboratory environment using test tubes or other lab equipment.
it was electrons
Observations are made in a test tube.
The liquid collected in a test tube is typically referred to as the "sample" or "solution." It can contain various substances or molecules depending on the experiment or analysis being conducted.
He conducted the experiment carelessly.
The most famous experiment conducted in Philadelphia is definitely the Philadelphia Experiment. It was conducted in the Philadelphia Naval Shipyard in 1943.
This classic diffraction experiment was conducted in 1911.
Because if the experiment being conducted in the test tube is explosive or very reactive then it can spit out stuff and this can be dangerous to your eyes or skin. so by pointing the test tube away then you won't harm anyone if anything spits out
John B. Watson conducted the Little Albert experiment in 1920.
The room pressure in the laboratory where the experiment is being conducted is measured in atmospheres (atm).
Ernest Rutherford's famous gold foil experiment, which led to the discovery of the atomic nucleus, was conducted at the University of Manchester in England in 1909.