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The laser light is pulsed and shone onto a reflective surface. The returned reflection is picked up by a phototransistor.
The time taken for the pulse to be sent and returned, can be measured by electronics within the device.
The speed of light is 300,000 Km /sec, (186,000 miles/sec) which is very fast, but finite.
The timing circuits within the device have to be very accurate and stable. This is acheived by using crystal oscillators within the device, to act as timing comparison.
What else can I help you with?
What would you call a device that works with binary data?
Digital Data is data that is stored in binary, and a Digital Device is any device that works with binary data
What device works as an output and input device?
A Touchscreen Monitor will work as an input and output device
What device works with discrete data or digits such as 1s and 0s?
Any digital device - as opposed to an analogue device.
What electrical device works by adding primary colors?
Any electrical device that emits Light
What device works with discrete data or digits?
analog
What principle can explain how a hydraulic device works?
archimedes' principle
How works bjt transistor as a sram device?
Define BJTSRAM?
What is one example of a device that works on a internet layer?
A router.
Which device of computer who works both of input and output?
A good example of an input and output device is a touchscreen monitor.
Rhetorical device works by attempting to make someone or something less significant or important?
A downplayer is a rhetorical device that works by attempting to make someone or something less significant or important.
How do you determine if a usb port is still good?
You check if a usb device e.g. flash memory works in a good port. If it works, do that in the port you'd like to determine and see if your device is found.
What device works best to download books?
Nook from Barnes and Noble works best; it has the widest range of connectivity.
