The camera

1. the camera obscura effect is when a light goes through a tiny hole and is projected on the opposite wall. the tiny  hole is made on one wall and the light goes through it and is put out onto the opposite wall.
2.optics and making the glass lens was the invention in the 17th century that helped man get closer to creating a modern day camera.
3.a glass lens and a dark box and film.
4. the light passes through the lens and goes into the camera and into the film.
5. electronic sensor called CCD
6. the difference between auto mode and program mode is auto completely controls the flash and exposure and the program mode is automatic assist
7. portrait mode is to blur out the background. the camera uses the fastest available lens settin.
8. the sports mode is used to stop the motion of things moving, the camera uses the highest shutter speed available
9. you should half press the shutter button because its faster camera response, more control over focus, and encourages better composition.
10. it means no flash. use it when there natural light 
11. it means auto-flash. it is used if it needs more light.
12.  the photo will be washed out if there is too much light.
13. the picture will be to dark if not enough light
14.a "stop" is a measurement of light
15. one stop
16. 2 stops
17.it lets in more light
18. it has less light
19.how big the hole is to let the light pass through
20. by using the F-stop.