Final answer:
The tube discovered in 1895 is the Roentgen's tube, associated with the discovery of x-rays by Wilhelm Roentgen. Crookes invented the cathode ray tube and improved it by evacuating air, paving the way for further scientific advancements.
Step-by-step explanation:
The tube that was discovered in 1895 is named the Roentgen's tube, which is also associated with the discovery of x-rays. The cathode ray tube itself was first invented by Sir William Crookes, and his work was essential in the development of the Roentgen's tube. Wilhelm Roentgen, a German physicist, used a cathode ray tube to discover x-rays by noticing that the rays could penetrate substances and leave an image on photographic film, a groundbreaking discovery in the field of physics and medical imaging.
Sir William Crookes contributed significantly to the development of the cathode ray tube by finding ways to evacuate almost all the air from the tube, confirming that cathode rays had mass and consisted of a stream of particles, which were later identified as electrons. Additionally, the cathode ray tube served as a basis for important inventions such as Karl Ferdinand Braun's oscilloscope and eventually led to innovations in television technology.