The same ones used in the camera for taking the pictures, usually the visible light spectrum waves.
Some older autofocusing systems (e.g. one used on some Polaroid instant cameras) used a SONAR ranging system, which used sound waves not electromagnetic waves.
Whenever the user desires to take a picture.
ultra violet
The electromagnetic wave used here is Ultraviolet wave...
Radio waves are a type of electromagnetic wave.
Radio 'waves'.
Light is an example of a electromagnetic wave.
An electromagnetic wave is a radiant wave.
The electromagnetic wave used here is Ultraviolet wave...
Radio waves are a type of electromagnetic wave.
Radio 'waves'.
A laser generates an electromagnetic wave operating at light frequencies.
Light is an example of a electromagnetic wave.
Ultraviolet Radiation
It is UltraViolet Radiation
Radio wave
An electromagnetic wave is a radiant wave.
Ultraviolet light.
It produces an UltraViolet electromagnetic wave. This can vary because there are several different lasers that can be used in lasik surgery.
Radio wave