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PHYSICS

JAMB 2018 - Question 8

Physics 2018 JAMB Past Questions - Question 8: Cathode rays are.

Choose the correct answers from the options given.

Cathode rays are.

A: high- energy electomagnetic waves

B: protons

C: neutrons

D: streams of electrons

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Correct Answer

Explanation

Cathode rays are streams of electrons that are emitted from the cathode (negative electrode) in a vacuum tube. They were first discovered by J.J. Thomson in the late 19th century. Cathode rays played a crucial role in the development of modern physics and led to the discovery of the electron. They also paved the way for the invention of various electronic devices, such as cathode ray tubes (CRTs) used in old television sets and computer monitors.