What is photography?

Photography means painting with light and comes from the greek
photos = light, graphic =  painting.

So how does one paint with the light?

The ray of light enter a dark chamber and the image projects two times inverted on the photo sensitive material which captures the image. This process does not change from analog to digital photography, its the same just the photosensitive material is changing from film to a digital backup.

Here is one of the first photos ever taken! Of course at that time the cameras where still al lot bigger than what we use today and it took a long time to capture an image, which made it difficult to capture moving things.