Each of the following conditions must exist for x-rays to be produced except one. Which one is the exception?
A) A target capable of stopping the electrons
B) An air-filled glass tube
C) High voltage to impart speed to the electrons
D) A source of free electrons
B
Explanation: A) The tube is a glass bulb from which the air has been pumped out to create a vacuum. The vacuum offers minimal resistance to the electrons traveling from the cathode to the target.
B) The tube is a glass bulb from which the air has been pumped out to create a vacuum. The vacuum offers minimal resistance to the electrons traveling from the cathode to the target.
C) The tube is a glass bulb from which the air has been pumped out to create a vacuum. The vacuum offers minimal resistance to the electrons traveling from the cathode to the target.
D) The tube is a glass bulb from which the air has been pumped out to create a vacuum. The vacuum offers minimal resistance to the electrons traveling from the cathode to the target.
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