Definition

1. Noun:
   • The original gas-discharge cathode-ray tube: A Crookes tube is an early experimental electrical discharge tube in which cathode rays (streams of electrons) were discovered. It is a partially evacuated glass tube containing electrodes, used to demonstrate the properties of these rays.

Usage Examples

• Noun:
  • The scientist used a Crookes tube to study the behavior of cathode rays.
  • The discovery of the electron was made possible by experiments with the Crookes tube.

Advanced Usage

• Historical Context: The term is almost exclusively used in historical or scientific contexts to refer to the specific apparatus invented by Sir William Crookes in the late 19th century. It is a precursor to modern cathode-ray tubes (CRTs).
  • The museum's exhibit on the history of electricity features an original Crookes tube.

Variants and Related Words

• Cathode-ray tube (CRT): A later, more advanced vacuum tube that uses a focused beam of electrons, descended from the Crookes tube. Commonly found in old television and computer monitors.
• Discharge tube: A more general term for any tube containing a gas at low pressure through which an electric current can pass.

Synonyms

• Early cathode-ray tube
• Gas-discharge tube (in a specific historical context)

Related Phrases

• Crookes dark space: Also known as the cathode dark space, a non-luminous region adjacent to the cathode in a Crookes tube discharge.
  • The experiment demonstrated the Crookes dark space within the tube.

Noun

1. the original gas-discharge cathode-ray tube