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1

aerial photograph

any photograph taken from the air

2

An aerial photograph, in broad terms, is any photograph taken from the air. Normally, air photos are taken ........................ using a ............................................

vertically from an aircraft

highly-accurate camera.

3

There are several things you can look for to determine what makes one photograph different from another of the same area including

type of film, scale, and overlap

4

Other important concepts used in aerial photography are

stereoscopic coverage, fiducial marks, focal length, roll and frame numbers, and flight lines and index maps.

5

Optics refer to

lenses and the geometry of light retrieval in a camera

6

Optics refer to lenses and the geometry of light retrieval in a camera. The lenses in a camera are responsible for

focusing and zooming on an object

7

Before light reflected from an object ..........................., it must pass through

strikes the film

one or more lenses

8

As light passes through a lens, it is

bent to focus the imaged object on the film

9

To minimize distortions associated with the use of ..................

single lenses

10

To minimize distortions associated with the use of single lenses, most camera lenses are actually composed of ............................... that work in concert to 

multiple lenses 

form an image onto the film

11

most air photo missions are ............. using ..................

flown

black and white film

12

most air photo missions are flown using black and white film, however .....................................................are sometimes used for special projects

colour, infrared, and false-colour infrared film

13

Film in a camera is used to record the image that passes through the

lens

14

Photographic film is composed of

a durable base

15

Film in a camera is used to record the image that passes through the lens. Photographic film is composed of a durable base, which is coated with a ................................ known as the .......................

light-sensitive layer know as the emulsion

 

16

During the short time that a shutter is open

light strikes the film and leaves a latent image on the emulsion

17

. During the short time that a shutter is open, light strikes the film and leaves a latent image on the emulsion. This image can be made visible by

the process of developing and printing.

18

Emulsions are made of

materials sensitive to particular regions of the electromagnetic spectrum

19

Emulsions are made of materials sensitive to particular regions of the electromagnetic spectrum. For example,

some film is only sensitive to visible light, whereas other film is sensitive to near-infrared light

20

In color film, the emulsion is composed of

three layers, with each being sensitive to different wavelengths of light,

21

In color film, the emulsion is composed of three layers, with each being sensitive to different wavelengths of light, normally

blue, green and red light.

22

With black and white film, the emulsion is sensitive to

to a broad spectrum of light

23

Film emulsions are generally limited to recording wavelengths between

0.4 to 0.9 micrometers

24

Black and white film sensitive to

visible light

25

black and white film sensitive to

infrared wavelengths

26

Black and white film sensitive to visible light and black and white film sensitive to infrared wavelengths can also be used for

remote sensing purposes

27

Film speed is another quality of

emulsions that is important for aerial photography

28

Film speed refers to

the quantity of light that is needed to expose the emulsion

29

Fast film requires

less light than slow film to record the same image

30

If the camera platform is moving, one would want to use ............................ to ....................................................

a high speed film to reduce the blurring effects of the moving camera