Do camera need light to work?

Answer 1

If you're wondering about the flash mechanism, it works just like a flashlight. There is a little lightbulb which gets power from the camera battery to light up when taking a picture with flash.

If you're wondering about the display, it works in the same way above only with LEDs (Light Emitting Diodes).

Answer 2

This is a tricky one to explain in words. The short answer is: a camera is a light tight box which focuses an image through a lens onto a light sensitive material or sensor which can permanently record the image. Your eyes are cameras. They focus the images you see onto the light sensitive retinas at the back of your eye. The difference is that your eyes can't make a permanent record of what you see. Your camera can.

The word camera is from the Latin for a chamber or room. The first optical camera, and an extremely ancient one at that, was a camera obscura, which means dark room in Latin. In one wall there would be a small hole which had the characteristic of optically projecting the sunlit scene outside the dark room or tent (camera obscura) onto the opposite wall. A person inside the space could sketch or trace the image onto paper, getting accurate spatial perspective of the scene. A modern camera is simply a hand-held camera obscura.

But what people really wanted was to be able to somehow record that projected scene without having to climb inside the dark room and sketch it. They wanted photography, a word which comes from two Greek words for writing [drawing] with light. They already had the camera, and they had improved the simple hole in the wall by adding a lens, which is a curved piece of glass that had the same effect as the hole: that is, it gathered the light from the scene and focused it on the opposite wall of the camera obscura, except that a lens could gather and focus far more light for a much brighter image. (For great fun, you can make yourself a working pinhole camera today using anything from a shoe box to, say, a garage. Lots of great photographs have been made using pinhole cameras.)

So now we have a camera and we have a lens. Together they gather light from a scene and focus it on a surface inside the camera. But how to make a permanent record of the scene without climbing inside and sketching it? We need chemical photography (which today has been largely displaced by digital imagery using a light sensitive sensor, but the principle is the same).

The ancient Greeks had noticed that exposure to light either darkens or fades some materials. Between the 12th and 17th Centuries several researchers had discovered or described the effect of light on compounds of silver. The breakthrough came sometime in the early summer of 1826 when the French inventor Joseph Nicéphore Niépce produced the first permanent photograph on a pewter plate using a petroleum derivative called bitumen of Judea. His camera obscura exposure required 8 full hours (eek!), but it was the start. The main thing was that Niépce focused an image of a scene inside a camera onto a light sensitive material to record a permanent image. It was a photo-graph, or light drawing. Today you probably have a digital camera which uses no light sensitive film, but even using a digital sensor, that's how your camera works using light. Be sure to check out the Related Link below.

Answer 3

A digital camera contains what is known as an Image Sensor. An Image Sensor contains very small silicone chips made up of millions of photosensitive diodes, called 'Photosites'. During exposure the 'Photosites' record the intensity or brightness of the light that falls onto the sensor. Each photosite is then stored as a set of data.

Answer 4

It depends on the power of the camera, and it also depends on what your taking a picture of. But in general, cameras dont need light to work.

Answer 5

its establishing.......:)