How does a light detector resistor work in a camera?

0 ⤊

How does a light detector resistor work in a camera?

2006-12-14 08:11:14 · 4 answers · asked by clinton12300 1 in Science & Mathematics ➔ Physics

4 answers

As light hits the detector surface, electrons are liberated. More light = more electrons = less resistance.

Cheers.

2006-12-15 00:11:51 · answer #1 · answered by chopchubes 4 · 0⤊ 0⤋

When light falls on a light dependent resistor (LDR) its resistance decreases. This can be used in a circuit to operate a motor which in turn operates the iris which controls the amount of light entering the camera.

2006-12-14 16:25:34 · answer #2 · answered by Jim S 2 · 0⤊ 0⤋

A nice site to look at is http://www.howstuffworks.com/ Search for "digital camera".

2006-12-14 16:27:39 · answer #3 · answered by Robert W 4 · 0⤊ 0⤋

as above

2006-12-15 12:59:33 · answer #4 · answered by dream theatre 7 · 0⤊ 0⤋