Which of the following is NOT a basic component of a Photo Detector?

A basic component of a photo detector primarily includes a light detector that converts light signals into electrical signals. The light source is not typically part of the photo detector itself, as the detector is designed to respond to an external light source rather than generate light. The output switching device is also relevant as it often helps in processing and using the output signals generated by the detector.

An amplifier, however, is often included in some configurations of photo detectors to enhance the weak electrical signals produced, but it is not a fundamental part of every basic photo detector. Thus, while amplifiers are useful in certain applications, they are not essential components of the core functionality of a photo detector, which primarily revolves around detecting light and converting it into a signal that can be processed. This clarifies why amplifiers, while beneficial, may not be considered a basic component of a photo detector.