is an electomagnetic energy that travels in a form of a wave with the speed of 186,000 miles per second.

a light tight box designed to block unwanted or unnecessary light from reaching the sensitized material.

a positive image can be made

is the process necessary for reducing silver halides into a form so as a latent image

composed of a highly sensitized chemical compound which is capable of being transformed into an image through the action of light with some chemical processes

Forms of electromagnetic radiation like radio waves, light waves or infrared (heat) waves make characteristic patterns as they travel through space.

The distance between peaks (high points) is called

Set of all wavelengths

is the distance measured between two (2) successive crest or through of wave and it is  expressed in either Milimicron (nanometer) or Angstrom.

is the units of light wavelength which is equivalent to one-million part of a millimeter.

is relatively smaller for it has an equivalent measurement of ten (10) millionth part of the millimeter.

is the many different wavelengths of energy produced by a light source.

Light is measured in

the part of the spectrum from 380nm to 780nm.

INFRARED

UV

Visible light

Blue

Green

Primary Color of Light

Secondary Color of Light

RED + BLUE

BLUE + GREEN

RED + GREEN

RED + BLUE + GREEN

MAGENTA + CYAN

MAGENTA + CYAN + YELLOW

YELLOW + MAGENTA

CYAN + YELLOW

is the bouncing back of the light when it hits a surface

is the bending of light, when light hits a certain medium which affects its velocity

is the spread of light into various colors of different wavelength after it has refracted.

is the light action when light falls bends and falls around the object

when the light hits a transparent glass which would allow the light to pass through its medium.

when the light hits a dark colored object and prevents it from either bouncing or passing through.

is the action of light once the light hits a mirror and it bounce back.

visible light can easily pass through them.

Greatly diffuses the light.

light in which their wavelength are either too short or too long to excite the retina of the human eye.

It is the type of light, which is capable of exciting the retina of the human eye.

object in an open space cast no shadow due to thick clouds covering the sun.

object in an open space cast a deep and uniform shadow and the object appears glossy.

object in an open space cast a transparent or bluish  shadow. This is due to thin clouds that cover the sun.

otherwise known as man-made light

are those light which come to existence without the intervention of man

is likewise known as Reflectorized light or Spot light. It is a light with a reflector at the back  which focus the light to the object the common wattages of this lamp is 500 watts

generate lights by the rapid combination of metal in oxygen. The bulb can  be used only once as the bulb is busted when fired electrically.

It refers to the film and photographic paper that basically composed of emulsion containing Silver Halides suspended in gelatin and coated on a transparent or reflective support.

substance present in the emulsion surface of the sensitized material which actually react with light.

part of the film or photographic paper sensitive  to light. In a colored film this emulsion surface can be composed of three layers (Blue, Green and Red) with filters intervening.

made of plastic material that serves as a support to the emulsion.

usually represented by a prefix or a suffix “Pan” or “Ortho” and generally used in black and white photography.

represented by the “color” to which it is sensitive.

represented by the word “chrome”

sensitive to all colors and to infra-red light.

sensitive to  UV light and blue color.

sensitive to UV Light up to red

sensitive to  UV light up to green

this is expressed in arithmetic value system.

expressed as combination of ASA and DIN rating.

expressed in Logarithmic value system. Used in the same principle as the ASA

combines the contrast range in one paper it uses a special chlorobromide emulsion that produces varying contrast responses upon exposure to different colors of light.

used, projection, printing and enlarging process. This is one of the most ideal photo paper used for police photography. Will give a black tone when properly developed.

used both for projection and contact printing, slow emulsion.

used for contact printing, the size of the positive print is the same as the size of the negative used. Sensitivity to light is low and give blue-black tones when properly developed.

papers used for small prints or which are need to be mounted on solid and fine details necessary in the production. Used in ordinary photographic purposes.

good for enlarging purposes.

generally used for large prints because they stand up under rough treatment.

designed for high flexibility and when  paper thickness is not of consideration. Intended for purposes, which involves folding.

designed for fine details and brilliant image formation.

used for large prints or where breath rather than detail is necessary.

obscure the fine details.

prepare for tone prints.

better used in police photography .

preferred for pictorial effect, portraits, landscape or when warmth effect is desired.

used for printing extremely contrast negative or extremely exposed film.

used for normal  exposed film.

used for high contrast negative (over exposed film)

for flat negative that are unprintable.

used for negative with weak contrast (under exposed)

used to provide sufficient contrast to compensate for very thin or weak negatives. It is useful imprinting which high contrast is desired.

It is considered as the smallest and the simplest type of camera.

it is a type of camera best suited for police work due to its interchangeability of the lens.

a type of a camera that immediately produce a positive prints. Designed by E.H. Land.

a type of camera with dual lens, one for focusing and the other for forming the image.

designed to collect or to focus the reflected light from an object to form an image on the film.

 a box designed to keep light out and serve as a frame to hold other parts.

located at the opposite side of the lens designed to hold firmly the sensitized material to prevent the formation of the multiple or  blurred image.

designed to control the time during which the light reaches the film.

designed to determine the field of view  of the camera or the extent of the coverage of the given lens.

located near the focal plane usually made from cloth curtain which open on one side and closes on the other sides.

one that is located near the lens leaves usually made of metal which opens from the center towards the side closes vis-a-vis.