The teacher explained it used a cathode ray tube like other screens, but this what measured things?\nOptions:\n- vacuum tube\n- television\n- computer\n- cathode ray\n- oscilloscope
A step-by-step solution is:
oscilloscope
There are different types of oscilloscopes.

One kind of oscilloscope contains cathode ray tubes.

Oscilloscope can also be used to measure things.

.

So, the final answer is oscilloscope