In the example of using a multimeter to display voltage -
Using a Voltmeter, you use the example of an LED converting light into voltage.
From my understanding of LED's, the reason they are called LED's are the full spelling of the acronym: Light Emitting Diode. LED's convert current into light (hence, the word "Emitting" in the acronym).
It is my understanding that Light Sensing Diode's are what you would be using to convert the light into electricity (which is what the chapter is showing - how to read voltage in a multimeter). Another option would be using a solar cell to convert light into voltage (typical solar cells are 1.5-2.0v at low milliamp rating).
Using a Voltmeter, you use the example of an LED converting light into voltage.
From my understanding of LED's, the reason they are called LED's are the full spelling of the acronym: Light Emitting Diode. LED's convert current into light (hence, the word "Emitting" in the acronym).
It is my understanding that Light Sensing Diode's are what you would be using to convert the light into electricity (which is what the chapter is showing - how to read voltage in a multimeter). Another option would be using a solar cell to convert light into voltage (typical solar cells are 1.5-2.0v at low milliamp rating).