In simple terms, whats a Cathode Ray Oscilloscope?
A cathode ray in general is a classical name for a “beam of electrons”, from before knowledge of the electron. “Cathode” means something which attracts positive charges, hence the negatively charged electron. A CRT is a cathode ray tube, an evacuated region of space in which the cathode rays undergo their controlled motion. An oscilloscope in general is a device used to display a “picture” of the shape of electric signals in manners that we can measure and interpret carefully for interest of studying electricity. So, a cathode ray oscilloscope is a device used to display a “picture” of the shape of electric signals in manners that we can measure and interpret carefully for interest of studying electricity, and it is built from tubes which contain evacuated regions of space in which the beams of electrons undergo their controlled motion.
