Final answer:
The electrons arrive at the output phosphor with increased energy and contain the image of the input phosphor in minified form. The correct answer is C. Increased energy and minified image.
Step-by-step explanation:
The question asks about the characteristics of electrons as they leave the output phosphor of a device such as a photomultiplier tube or a Cathode Ray Tube (CRT). Specifically, it inquires whether the electrons arrive at the output phosphor with increased or decreased energy and whether the image they contain is magnified or minified. Based on the principles of the photoelectric effect and the description of photomultipliers, we can deduce that the electrons have increased energy due to the cascade effect in the photomultiplier where one electron ejects multiple electrons. The CRT schematic described portrays the electron beam causing the phosphor to glow, which is used to display an image. Commonly, the image is minified due to the design of CRTs, particularly in devices like oscilloscopes where the large screen is represented in a smaller area.
The increased energy comes from the acceleration of electrons through the successive potential differences, and the image is minified because the process involves projecting a larger image onto a smaller display area. Thus, the correct answer is C. Increased energy and minified image.
This question is not complete, Here I am attaching the complete question:
The electrons arrive at the output phosphor with ______ and contain the image of the input phosphor in minified form.
A. Increased energy and magnified image
B. Decreased energy and magnified image
C. Increased energy and minified image
D. Decreased energy and minified image