Forensic Photography II

Question 1

The amount of light reflected by the performer and the background.

Answer 1

Intensity

Question 2

Also known as the temperature of the light reflected by the performer and the background.

Answer 2

Color

Question 3

Determines the length and location of the shadows cast by the
performer and the three-dimensional props around him.

Answer 3

Direction

Question 4

It is not something we can measure. It is, instead, something we describe based upon
visual perception; light is either soft or hard. Also, may referred to as the Hardness of the light.

Answer 4

Quality

Question 5

Refers to the difference in brightness between the brightest and darkest parts of the image which is
the contrast between highlight and shadow areas. Highlights are the brightest parts of the image and shadows
are the darker regions of an image.

Answer 5

Contrast

Question 6

It is when the sun sets, day turns into night and it becomes dark.

Answer 6

Moon and Stars

Question 7

The most popular and mostly used light source of photographers. It is free and no need to be transported.
But it is not always there where we want it. It is uncontrollable but can be controlled using the camera controls (shutter
speed & aperture opening).

Answer 7

Sunlight

Question 8

This is the direct sunlight striking the subject. It is the brightest of all, it is highly directional, images taken with distinct sun is characterized by extreme highlights and deep shadows and it provides the highest contrast in a picture.

Answer 8

Bright sunlight or Distinct sun

Question 9

When the sun is covered by thin clouds but still clearly visible and it is illuminating your subject, it produces soft shadows and moderate highlight and contrast is also moderate, while
rays are directional.

Answer 9

Hazy Sunlight

Question 10

Objects in open space cast no shadow

Answer 10

Dull Sunlight or Cloudy

Question 11

Sun is bright but not visible, light is soft and not directional,

Answer 11

Overcast Sky or Cloudy Bright

Question 12

This is practically the same as overcast sky but generally darker and light is dull. It provides very poor contrast and static cloud is so thick where one cannot tell the overhead position of the sun.

Answer 12

Heavy Overcast or Cloudy Dull

Question 13

Distinct sun is used as ______ lighting when it comes from behind the photographer

Answer 13

Front Lighting

Question 14

This type of lighting happens mostly in the morning and afternoon when the sunlight hits the subject from either the right or left flank of the photographer.

Answer 14

Side Lighting

Question 15

This type of lighting happens when the sun strikes the subject from behind

Answer 15

Back Lighting

Question 16

This normally occurs at noontime where sun is directly above your subject.

Answer 16

Overhead Lighting

Question 17

Closest star on earth (4 light-years)

Answer 17

Centauri Proxima

Question 18

Primary application of forensic light source for enhancing the detection of latent fingerprint

Answer 18

Latent fingerprint detection

Question 19

The dried body fluids will actually glow under the light source of illumination

Answer 19

Bodily fluids

Question 20

Two light illumination method can be employed. first, oblique or parallel lighting of a surface. Second, hair and fibers will also glow under UV.

Answer 20

Hair and fibers

Question 21

A tunable forensic light source can be used to identify light variations in ink type by viewing ink responses as the color of the light is turned through the visible and infrared regions.

Answer 21

Questioned Document

Question 22

SPEED OF LIGHT

Answer 22

299,792,458 meters per second

Question 23

Refers to some units are portable battery operated and are easily carried and can meet the rugged and rigorous demand for Field work

Answer 23

UV Lamp

Question 24

Refers to Light amplification through simulated emission of radiation. They would fluoresce or could be made to stand out in sharp contrast from their background.

Answer 24

LASER

Question 25

Refers to far more expensive alternative to forensic laser. It uses a variety of band pass filters to provide a high intensity beam of non-coherent light.

Answer 25

Alternative Light Source

Question 26

Refers to a wide variety of relatively inexpensive light sources which used filtered white light.

Answer 26

Forensic light source

Question 27

Refers to a pair of carbon rods connected in series with a resistance across directly current.

Answer 27

Carbon arc

Question 28

Refers to a conducting filament enclosed by a glass bulb heated by the electric current until emits light.

Answer 28

Incandescent

Question 29

Refers to a lamps that can be placed up very high producing deep shadows underneath protruding surfaces. These can be placed to shine from below giving mysterious and strange effects of frights to observers of the picture

Answer 29

Photoflood lamps

Question 30

Refers to illumination in an electric discharge lamp of the mercury-vapor type

Answer 30

Fluorescent Lamps

Question 31

Refers to light that produces by the rapid burning of metal wire, foil, or primer powders.

Answer 31

Chemical flash lamp

Question 32

This is consisting of a slender glass tube filled with a gas (xenon), a high voltage electrical discharge is passed through coiled tube, causing the gas to glow.

Answer 32

Electronic flash lamp

Question 33

It occurs whenever an object changes the direction of a light wave but does not allow the wave to pass through it.

Answer 33

Reflection

Question 34

It is the change in direction of a wave due to a change in its speed.

Answer 34

Refraction

Question 35

It is described as the apparent bending of waves around small obstacles and the spreading out
of waves past small openings.

Answer 35

Diffraction

Question 36

It allows sufficient visible light to pass through them that the object on the other side may be
clearly seen

Answer 36

Transparent objects

Question 37

It allows light to pass, however diffuse it sufficiently that objects on the other side may not be clearly distinguished

Answer 37

Translucent objects

Question 38

It is so greatly diffuse the light that recognizing the object on the other side is very difficult if not impossible

Answer 38

Opaque objects

Question 39

electromagnetic energy having a wavelength that ranges between 10-30 millimicrons

Answer 39

X-ray

Question 40

divided into the near and far ultraviolet and ranges from about 200-400 millimicrons wavelength.

It is used to photograph fingerprints on multi – colored background, documents that are altered chemically or over writings and detection of secret writings.

Answer 40

Ultraviolet light

Question 41

Shortest wavelength

Used in recording or photographing objects hidden by opaque mediums.

Answer 41

Gamma rays

Question 42

high energy charged particles, originating in outer space, that travel at nearly the speed of light and strike the Earth from all directions.

Answer 42

Cosmic rays

Question 43

. It is an invisible rays and it is only detected by the human skin as heat.
• Used in taking photographs of obliterated writing, burnt or dirty documents. Also known as
“Blackout photography”.

Answer 43

Infrared light

Question 44

These light waves have the longest wavelength of all lights.

Used for communicating through the modification and amplification of sound waves.

Answer 44

Radio waves

Question 45

excite the water molecules in food, heat them up, and pass the heat throughout the
food.

It can harm the body because it can heat the water molecules in deep tissues.

Answer 45

Microwaves

Question 46

An electromagnetic wave produced by the oscillation of electricity in a conductor (as a radio antenna) and of a length ranging from a few millimeters to many kilometers.

Answer 46

Hertzian waves