Question

The most commonly used types of automatic exposure devices are the:

a) Ion chamber
b) Photomultiplier tube
c) Cathode ray tube
d) Solid-state sensor

Answer 1

The most commonly used types of automatic exposure devices are ion chambers, photomultiplier tubes, and solid-state sensors.

Step-by-step explanation:

The most commonly used types of automatic exposure devices are:

1. Ion chamber: An ion chamber is used to measure the radiation exposure by determining the amount of ionization that occurs in the gas within the chamber. It consists of a metal box with a read-out screen and a wire connected to a sensor wand.
2. Photomultiplier tube: A photomultiplier tube detects and measures radiation by converting the light emitted from a scintillator material into an electric signal. It is commonly used in scintillation counters.
3. Solid-state sensor: A solid-state sensor, such as a semiconductor detector, is used to detect and measure radiation. It is often used in modern radiation detectors due to its compact size and high sensitivity.