Cam broadcasts for adults
Photo: Unlike the webcam above, which you can focus by twisting its lens, this Microsoft Life Cam VX-800 has a preset focus.
If you look closely, you can just see the power indicator light (top left, not currently lit up) and the microphone (top right).
When you take a digital photo or stare into your webcam, light zooms into the lens.
This incoming "picture" hits the image sensor, which breaks it up into individual pixels that are converted into numeric form.
Just like a digital camera, it captures light through a small lens at the front using a tiny grid of microscopic light-detectors built into an image-sensing microchip (either a charge-coupled device (CCD) or, more likely these days, a CMOS image sensor).
Some cams work wirelessly and don't need to be connected to a computer: typically they use Wi-Fi to transmit their pictures to your Internet router, which can then make them available to other machines on your home network or, using the Internet, to anyone, anywhere in the world.So it's essentially a digital device where a CCD is an analog one.