Coolis tube is used to produce
(1) Radio waves
(2) Microwaves
(3) X-rays
(4) Gama rays
Answer: (3) X-rays are part of the electromagnetic spectrum, ionizing radiation with wavelengths shorter than ultraviolet light. X-ray tubes evolved from experimental Crookes tubes with which X-rays were first discovered in the late 19th century, and the availability of this controllable source of X-rays created the field of radiography, the im
aging of opaque objects with penetrating radiation.