What is the cathode ray discharge tube experiment?

What is the cathode ray discharge tube experiment?

The Cathode ray experiment was a result of English physicists named J. J. Thomson experimenting with cathode ray tubes. During his experiment he discovered electrons and it is one of the most important discoveries in the history of physics.

What was the result of the cathode ray experiment Class 11?

The charge and mass of cathode rays does not depend on the nature of gas in the tube. Cathode rays contain negatively charged particles called electrons. As all the gases produce cathode rays, it was concluded that all the atoms contain electrons.

What is discharge tube in chemistry class 11?

A discharge tube is a cylindrical glass tube in which a gas can be filled and which is fitted with metal plates called electrodes at each end.

What are cathode rays class 11?

Cathode rays are the beam of electrons travelling from the negatively-charged cathode to the positively charged anode at the other end of the vacuum tube. These cathode rays travel in a straight-line path at high speed when a voltage difference is applied to the electrodes.

What is the basic principle of discharge tube?

The fundamental mechanism is the Townsend discharge, which is the sustained multiplication of electron flow by ion impact when a critical value of electric field strength for the density of the gas is reached.

What is cathode ray tube explain with diagram?

A cathode-ray tube (CRT) is a specialized vacuum tube in which images are produced when an electron beam strikes a phosphorescent surface. Most desktop computer displays make use of CRTs. The CRT in a computer display is similar to the “picture tube” in a television receiver.

What was the conclusion of the cathode ray experiment?

Summary. J.J. Thomson’s experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. Thomson proposed the plum pudding model of the atom, which had negatively-charged electrons embedded within a positively-charged “soup.”

What are cathode rays give three features of it?

The characteristics of cathode rays are:

• They consist of negatively charged particles.
• Cathode rays are also called as electrons.
• Electrons are lighter than the Hydrogen atom.
• Electrons mass is very small or less.

What was the purpose of the discharge tube experiment?

d) Positive rays are heavier than protons. Hint: The discharge tube experiment is another name for the ‘Cathode Ray Tube experiment’. The Discovery of the discharge tube revolutionized the study of atomic structure and subatomic particles.

Which gas is used in discharge tube?

For better results in a cathode tube experiment, an evacuated(low pressure) tube is filled with Hydrogen gas which being the lightest gas(perhaps, the lightest element), gives the maximum value of charge to mass ratio (e/m ratio = 1.76 x 10^11 coulombs per kg) on ionisation.

Which gas is used in cathode ray tube?

Hint: In this question the gases hydrogen and helium are filled in the tubes, one needs to find out whether this will have any effect on the cathode ray experiment. As per the cathode ray experiment the electrons are negatively charged for a cathode ray. This approach can be applied to solve the question.

Is cathode ray positive or negative?

Cathode rays are negatively charged particles because they are attracted to the plate of the cathode ray tube.

How are cathode rays produced Class 11?

Cathode rays come out from the cathode as the cathode is charged negatively. So, these rays strike and ionize the gas sample present inside the container. The electrons which are ejected from gas ionization travel towards the anode. These rays are electrons which are produced from the gas ionization inside the tube.

What is anode ray experiment 11?

An anode ray (also positive ray or canal ray) is a beam of positive ions that is created by certain types of gas-discharge tubes. They were first observed in Crookes tubes during experiments by the German scientist Eugen Goldstein, in 1886.

Why did Thomson result with cathode rays?

Why did Thomson’s results from experimenting with cathode rays cause a big change in scientific thought about atoms? His results gave the first evidence that atoms were made up of smaller particles.

What did JJ Thomson conclude about cathode rays?

In 1897 he reported that “cathode rays” were actually negatively charged particles in motion; he argued that the charged particles weighed much less than the lightest atom and were in fact constituents of atoms [Thomson 1897a, 1897b].