What is a cathode ray discharge tube? Write down its uses.

(N/A) cathode ray discharge tube is a glass tube used to study electrical discharge in gases at low pressures.
Construction:
$1$. It consists of a sealed glass tube containing two thin metal electrodes.
$2$. The tube is connected to a vacuum pump to maintain very low pressure inside.
$3$. $A$ high voltage source is connected across the electrodes.
Uses:
$1$. It is used to generate cathode rays by passing high voltage electricity through gases at very low pressure.
$2$. It helps in studying the properties of electrons and the nature of electrical discharge in gases.